diff --git a/example/wide_and_deep/README.md b/example/wide_and_deep/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..f770297dd01faadef848a6457ce3ffef80526f5c
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+++ b/example/wide_and_deep/README.md
@@ -0,0 +1,93 @@
+recommendation Model
+## Overview
+This is an implementation of WideDeep as described in the [Wide & Deep Learning for Recommender System](https://arxiv.org/pdf/1606.07792.pdf) paper.
+
+WideDeep model jointly trained wide linear models and deep neural network, which combined the benefits of memorization and generalization for recommender systems.
+
+## Dataset
+The [Criteo datasets](http://labs.criteo.com/2014/02/download-kaggle-display-advertising-challenge-dataset/) are used for model training and evaluation.
+
+## Running Code
+
+### Download and preprocess dataset
+To download the dataset, please install Pandas package first. Then issue the following command:
+```
+bash download.sh
+```
+
+### Code Structure
+The entire code structure is as following:
+```
+|--- wide_and_deep/
+    train_and_test.py            "Entrance of Wide&Deep model training and evaluation"
+    test.py                      "Entrance of Wide&Deep model evaluation"
+    train.py                     "Entrance of Wide&Deep model training"
+    train_and_test_multinpu.py   "Entrance of Wide&Deep model data parallel training and evaluation"
+    |--- src/                    "entrance of training and evaluation"
+        config.py                "parameters configuration"
+        dataset.py               "Dataset loader class"
+        WideDeep.py              "Model structure"
+        callbacks.py             "Callback class for training and evaluation"
+        metrics.py               "Metric class"
+```
+
+### Train and evaluate model
+To train and evaluate the model, issue the following command:
+```
+python train_and_test.py
+```
+Arguments:
+  * `--data_path`: This should be set to the same directory given to the data_download's data_dir argument.
+  * `--epochs`: Total train epochs.
+  * `--batch_size`: Training batch size.
+  * `--eval_batch_size`: Eval batch size.
+  * `--field_size`: The number of features.
+  * `--vocab_size`： The total features of dataset.
+  * `--emb_dim`： The dense embedding dimension of sparse feature.
+  * `--deep_layers_dim`： The dimension of all deep layers.
+  * `--deep_layers_act`： The activation of all deep layers.
+  * `--keep_prob`： The rate to keep in dropout layer.
+  * `--ckpt_path`：The location of the checkpoint file.
+  * `--eval_file_name` : Eval output file.
+  * `--loss_file_name` :  Loss output file.
+
+To train the model, issue the following command:
+```
+python train.py
+```
+Arguments:
+  * `--data_path`: This should be set to the same directory given to the data_download's data_dir argument.
+  * `--epochs`: Total train epochs.
+  * `--batch_size`: Training batch size.
+  * `--eval_batch_size`: Eval batch size.
+  * `--field_size`: The number of features.
+  * `--vocab_size`： The total features of dataset.
+  * `--emb_dim`： The dense embedding dimension of sparse feature.
+  * `--deep_layers_dim`： The dimension of all deep layers.
+  * `--deep_layers_act`： The activation of all deep layers.
+  * `--keep_prob`： The rate to keep in dropout layer.
+  * `--ckpt_path`：The location of the checkpoint file.
+  * `--eval_file_name` : Eval output file.
+  * `--loss_file_name` :  Loss output file.
+
+To evaluate the model, issue the following command:
+```
+python test.py
+```
+Arguments:
+  * `--data_path`: This should be set to the same directory given to the data_download's data_dir argument.
+  * `--epochs`: Total train epochs.
+  * `--batch_size`: Training batch size.
+  * `--eval_batch_size`: Eval batch size.
+  * `--field_size`: The number of features.
+  * `--vocab_size`： The total features of dataset.
+  * `--emb_dim`： The dense embedding dimension of sparse feature.
+  * `--deep_layers_dim`： The dimension of all deep layers.
+  * `--deep_layers_act`： The activation of all deep layers.
+  * `--keep_prob`： The rate to keep in dropout layer.
+  * `--ckpt_path`：The location of the checkpoint file.
+  * `--eval_file_name` : Eval output file.
+  * `--loss_file_name` :  Loss output file.
+
+There are other arguments about models and training process. Use the `--help` or `-h` flag to get a full list of possible arguments with detailed descriptions.
+
diff --git a/example/wide_and_deep/src/__init__.py b/example/wide_and_deep/src/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/example/wide_and_deep/src/callbacks.py b/example/wide_and_deep/src/callbacks.py
new file mode 100644
index 0000000000000000000000000000000000000000..1ceefc115a646dc4ca1ab019335695c2ab5d30b6
--- /dev/null
+++ b/example/wide_and_deep/src/callbacks.py
@@ -0,0 +1,104 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+callbacks
+"""
+import time
+from mindspore.train.callback import Callback
+from mindspore import context
+
+def add_write(file_path, out_str):
+    """
+    add lines to the file
+    """
+    with open(file_path, 'a+', encoding="utf-8") as file_out:
+        file_out.write(out_str + "\n")
+
+
+class LossCallBack(Callback):
+    """
+    Monitor the loss in training.
+
+    If the loss is NAN or INF, terminate the training.
+
+    Note:
+        If per_print_times is 0, do NOT print loss.
+
+    Args:
+        per_print_times (int): Print loss every times. Default: 1.
+    """
+    def __init__(self, config=None, per_print_times=1):
+        super(LossCallBack, self).__init__()
+        if not isinstance(per_print_times, int) or per_print_times < 0:
+            raise ValueError("per_print_times must be in and >= 0.")
+        self._per_print_times = per_print_times
+        self.config = config
+
+    def step_end(self, run_context):
+        cb_params = run_context.original_args()
+        wide_loss, deep_loss = cb_params.net_outputs[0].asnumpy(), cb_params.net_outputs[1].asnumpy()
+        cur_step_in_epoch = (cb_params.cur_step_num - 1) % cb_params.batch_num + 1
+        cur_num = cb_params.cur_step_num
+        print("===loss===", cb_params.cur_epoch_num, cur_step_in_epoch, wide_loss, deep_loss)
+
+        # raise ValueError
+        if self._per_print_times != 0 and cur_num % self._per_print_times == 0 and config is not None:
+            loss_file = open(self.config.loss_file_name, "a+")
+            loss_file.write("epoch: %s, step: %s, wide_loss: %s, deep_loss: %s" %
+                            (cb_params.cur_epoch_num, cur_step_in_epoch, wide_loss, deep_loss))
+            loss_file.write("\n")
+            loss_file.close()
+            print("epoch: %s, step: %s, wide_loss: %s, deep_loss: %s" %
+                  (cb_params.cur_epoch_num, cur_step_in_epoch, wide_loss, deep_loss))
+
+
+class EvalCallBack(Callback):
+    """
+    Monitor the loss in evaluating.
+
+    If the loss is NAN or INF, terminate evaluating.
+
+    Note:
+        If per_print_times is 0, do NOT print loss.
+
+    Args:
+        print_per_step (int): Print loss every times. Default: 1.
+    """
+    def __init__(self, model, eval_dataset, auc_metric, config, print_per_step=1):
+        super(EvalCallBack, self).__init__()
+        if not isinstance(print_per_step, int) or print_per_step < 0:
+            raise ValueError("print_per_step must be int and >= 0.")
+        self.print_per_step = print_per_step
+        self.model = model
+        self.eval_dataset = eval_dataset
+        self.aucMetric = auc_metric
+        self.aucMetric.clear()
+        self.eval_file_name = config.eval_file_name
+
+    def epoch_name(self, run_context):
+        """
+        epoch name
+        """
+        self.aucMetric.clear()
+        context.set_auto_parallel_context(strategy_ckpt_save_file="",
+                                          strategy_ckpt_load_file="./strategy_train.ckpt")
+        start_time = time.time()
+        out = self.model.eval(self.eval_dataset)
+        end_time = time.time()
+        eval_time = int(end_time - start_time)
+
+        time_str = time.strftime("%Y-%m-%d %H:%M%S", time.localtime())
+        out_str = "{}==== EvalCallBack model.eval(): {}; eval_time: {}s".format(time_str, out.values(), eval_time)
+        print(out_str)
+        add_write(self.eval_file_name, out_str)
diff --git a/example/wide_and_deep/src/config.py b/example/wide_and_deep/src/config.py
new file mode 100644
index 0000000000000000000000000000000000000000..707750c97a4a97375a0add31536fcddbd0a1670c
--- /dev/null
+++ b/example/wide_and_deep/src/config.py
@@ -0,0 +1,92 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" config. """
+import argparse
+
+
+def argparse_init():
+    """
+    argparse_init
+    """
+    parser = argparse.ArgumentParser(description='WideDeep')
+    parser.add_argument("--data_path", type=str, default="./test_raw_data/")
+    parser.add_argument("--epochs", type=int, default=15)
+    parser.add_argument("--batch_size", type=int, default=10000)
+    parser.add_argument("--eval_batch_size", type=int, default=15)
+    parser.add_argument("--field_size", type=int, default=39)
+    parser.add_argument("--vocab_size", type=int, default=184965)
+    parser.add_argument("--emb_dim", type=int, default=80)
+    parser.add_argument("--deep_layer_dim", type=int, nargs='+', default=[1024, 512, 256, 128])
+    parser.add_argument("--deep_layer_act", type=str, default='relu')
+    parser.add_argument("--keep_prob", type=float, default=1.0)
+
+    parser.add_argument("--output_path", type=str, default="./output/")
+    parser.add_argument("--ckpt_path", type=str, default="./checkpoints/")
+    parser.add_argument("--eval_file_name", type=str, default="eval.log")
+    parser.add_argument("--loss_file_name", type=str, default="loss.log")
+    return parser
+
+
+class WideDeepConfig():
+    """
+    WideDeepConfig
+    """
+    def __init__(self):
+        self.data_path = "./test_raw_data/"
+        self.epochs = 15
+        self.batch_size = 10000
+        self.eval_batch_size = 10000
+        self.field_size = 39
+        self.vocab_size = 184965
+        self.emb_dim = 80
+        self.deep_layer_dim = [1024, 512, 256, 128]
+        self.deep_layer_act = 'relu'
+        self.weight_bias_init = ['normal', 'normal']
+        self.emb_init = 'normal'
+        self.init_args = [-0.01, 0.01]
+        self.dropout_flag = False
+        self.keep_prob = 1.0
+        self.l2_coef = 8e-5
+
+        self.output_path = "./output"
+        self.eval_file_name = "eval.log"
+        self.loss_file_name = "loss.log"
+        self.ckpt_path = "./checkpoints/"
+
+    def argparse_init(self):
+        """
+        argparse_init
+        """
+        parser = argparse_init()
+        args, _ = parser.parse_known_args()
+        self.data_path = args.data_path
+        self.epochs = args.epochs
+        self.batch_size = args.batch_size
+        self.eval_batch_size = args.eval_batch_size
+        self.field_size = args.field_size
+        self.vocab_size = args.vocab_size
+        self.emb_dim = args.emb_dim
+        self.deep_layer_dim = args.deep_layer_dim
+        self.deep_layer_act = args.deep_layer_act
+        self.keep_prob = args.keep_prob
+        self.weight_bias_init = ['normal', 'normal']
+        self.emb_init = 'normal'
+        self.init_args = [-0.01, 0.01]
+        self.dropout_flag = False
+        self.l2_coef = 8e-5
+
+        self.output_path = args.output_path
+        self.eval_file_name = args.eval_file_name
+        self.loss_file_name = args.loss_file_name
+        self.ckpt_path = args.ckpt_path
diff --git a/example/wide_and_deep/src/datasets.py b/example/wide_and_deep/src/datasets.py
new file mode 100644
index 0000000000000000000000000000000000000000..775dd7ca54b5d12ab6b76c3157dd8952c222e61f
--- /dev/null
+++ b/example/wide_and_deep/src/datasets.py
@@ -0,0 +1,207 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============================================================================
+"""train_imagenet."""
+
+
+import os
+import math
+import numpy as np
+import pandas as pd
+import mindspore.dataset.engine as de
+import mindspore.common.dtype as mstype
+
+
+class H5Dataset():
+    """
+    H5DataSet
+    """
+    input_length = 39
+
+    def __init__(self, data_path, train_mode=True, train_num_of_parts=21,
+                 test_num_of_parts=3):
+        self._hdf_data_dir = data_path
+        self._is_training = train_mode
+
+        if self._is_training:
+            self._file_prefix = 'train'
+            self._num_of_parts = train_num_of_parts
+        else:
+            self._file_prefix = 'test'
+            self._num_of_parts = test_num_of_parts
+
+        self.data_size = self._bin_count(self._hdf_data_dir, self._file_prefix,
+                                         self._num_of_parts)
+        print("data_size: {}".format(self.data_size))
+
+    def _bin_count(self, hdf_data_dir, file_prefix, num_of_parts):
+        size = 0
+        for part in range(num_of_parts):
+            _y = pd.read_hdf(os.path.join(hdf_data_dir,
+                                          file_prefix + '_output_part_' + str(
+                                              part) + '.h5'))
+            size += _y.shape[0]
+        return size
+
+    def _iterate_hdf_files_(self, num_of_parts=None,
+                            shuffle_block=False):
+        """
+        iterate among hdf files(blocks). when the whole data set is finished, the iterator restarts
+            from the beginning, thus the data stream will never stop
+        :param train_mode: True or false,false is eval_mode,
+            this file iterator will go through the train set
+        :param num_of_parts: number of files
+        :param shuffle_block: shuffle block files at every round
+        :return: input_hdf_file_name, output_hdf_file_name, finish_flag
+        """
+        parts = np.arange(num_of_parts)
+        while True:
+            if shuffle_block:
+                for _ in range(int(shuffle_block)):
+                    np.random.shuffle(parts)
+            for i, p in enumerate(parts):
+                yield os.path.join(self._hdf_data_dir,
+                                   self._file_prefix + '_input_part_' + str(
+                                       p) + '.h5'), \
+                      os.path.join(self._hdf_data_dir,
+                                   self._file_prefix + '_output_part_' + str(
+                                       p) + '.h5'), i + 1 == len(parts)
+
+    def _generator(self, X, y, batch_size, shuffle=True):
+        """
+        should be accessed only in private
+        :param X:
+        :param y:
+        :param batch_size:
+        :param shuffle:
+        :return:
+        """
+        number_of_batches = np.ceil(1. * X.shape[0] / batch_size)
+        counter = 0
+        finished = False
+        sample_index = np.arange(X.shape[0])
+        if shuffle:
+            for _ in range(int(shuffle)):
+                np.random.shuffle(sample_index)
+        assert X.shape[0] > 0
+        while True:
+            batch_index = sample_index[
+                batch_size * counter: batch_size * (counter + 1)]
+            X_batch = X[batch_index]
+            y_batch = y[batch_index]
+            counter += 1
+            yield X_batch, y_batch, finished
+            if counter == number_of_batches:
+                counter = 0
+                finished = True
+
+    def batch_generator(self, batch_size=1000,
+                        random_sample=False, shuffle_block=False):
+        """
+        :param train_mode: True or false,false is eval_mode,
+        :param batch_size
+        :param num_of_parts: number of files
+        :param random_sample: if True, will shuffle
+        :param shuffle_block: shuffle file blocks at every round
+        :return:
+        """
+
+        for hdf_in, hdf_out, _ in self._iterate_hdf_files_(self._num_of_parts,
+                                                           shuffle_block):
+            start = stop = None
+            X_all = pd.read_hdf(hdf_in, start=start, stop=stop).values
+            y_all = pd.read_hdf(hdf_out, start=start, stop=stop).values
+            data_gen = self._generator(X_all, y_all, batch_size,
+                                       shuffle=random_sample)
+            finished = False
+
+            while not finished:
+                X, y, finished = data_gen.__next__()
+                X_id = X[:, 0:self.input_length]
+                X_va = X[:, self.input_length:]
+                yield np.array(X_id.astype(dtype=np.int32)), np.array(
+                    X_va.astype(dtype=np.float32)), np.array(
+                        y.astype(dtype=np.float32))
+
+
+def _get_h5_dataset(data_dir, train_mode=True, epochs=1, batch_size=1000):
+    """
+    get_h5_dataset
+    """
+    data_para = {
+        'batch_size': batch_size,
+    }
+    if train_mode:
+        data_para['random_sample'] = True
+        data_para['shuffle_block'] = True
+
+    h5_dataset = H5Dataset(data_path=data_dir, train_mode=train_mode)
+    numbers_of_batch = math.ceil(h5_dataset.data_size / batch_size)
+
+    def _iter_h5_data():
+        train_eval_gen = h5_dataset.batch_generator(**data_para)
+        for _ in range(0, numbers_of_batch, 1):
+            yield train_eval_gen.__next__()
+
+    ds = de.GeneratorDataset(_iter_h5_data(), ["ids", "weights", "labels"])
+    ds.set_dataset_size(numbers_of_batch)
+    ds = ds.repeat(epochs)
+    return ds
+
+
+def _get_tf_dataset(data_dir, train_mode=True, epochs=1, batch_size=1000,
+                    line_per_sample=1000, rank_size=None, rank_id=None):
+    """
+    get_tf_dataset
+    """
+    dataset_files = []
+    file_prefix_name = 'train' if train_mode else 'test'
+    shuffle = train_mode
+    for (dirpath, _, filenames) in os.walk(data_dir):
+        for filename in filenames:
+            if file_prefix_name in filename and "tfrecord" in filename:
+                dataset_files.append(os.path.join(dirpath, filename))
+    schema = de.Schema()
+    schema.add_column('feat_ids', de_type=mstype.int32)
+    schema.add_column('feat_vals', de_type=mstype.float32)
+    schema.add_column('label', de_type=mstype.float32)
+    if rank_size is not None and rank_id is not None:
+        ds = de.TFRecordDataset(dataset_files=dataset_files, shuffle=shuffle, schema=schema, num_parallel_workers=8,
+                                num_shards=rank_size, shard_id=rank_id, shard_equal_rows=True)
+    else:
+        ds = de.TFRecordDataset(dataset_files=dataset_files, shuffle=shuffle, schema=schema, num_parallel_workers=8)
+    ds = ds.batch(int(batch_size / line_per_sample),
+                  drop_remainder=True)
+    ds = ds.map(operations=(lambda x, y, z: (
+        np.array(x).flatten().reshape(batch_size, 39),
+        np.array(y).flatten().reshape(batch_size, 39),
+        np.array(z).flatten().reshape(batch_size, 1))),
+                input_columns=['feat_ids', 'feat_vals', 'label'],
+                columns_order=['feat_ids', 'feat_vals', 'label'], num_parallel_workers=8)
+    #if train_mode:
+    ds = ds.repeat(epochs)
+    return ds
+
+
+def create_dataset(data_dir, train_mode=True, epochs=1, batch_size=1000,
+                   is_tf_dataset=True, line_per_sample=1000, rank_size=None, rank_id=None):
+    """
+    create_dataset
+    """
+    if is_tf_dataset:
+        return _get_tf_dataset(data_dir, train_mode, epochs, batch_size,
+                               line_per_sample, rank_size=rank_size, rank_id=rank_id)
+    if rank_size > 1:
+        raise RuntimeError("please use tfrecord dataset.")
+    return _get_h5_dataset(data_dir, train_mode, epochs, batch_size)
diff --git a/example/wide_and_deep/src/metrics.py b/example/wide_and_deep/src/metrics.py
new file mode 100644
index 0000000000000000000000000000000000000000..277d6744dc92433375413fdae25426ec5245c296
--- /dev/null
+++ b/example/wide_and_deep/src/metrics.py
@@ -0,0 +1,51 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============================================================================
+
+"""
+Area under cure metric
+"""
+
+from mindspore.nn.metrics import Metric
+from sklearn.metrics import roc_auc_score
+
+class AUCMetric(Metric):
+    """
+    Area under cure metric
+    """
+
+    def __init__(self):
+        super(AUCMetric, self).__init__()
+        self.clear()
+
+    def clear(self):
+        """Clear the internal evaluation result."""
+        self.true_labels = []
+        self.pred_probs = []
+
+    def update(self, *inputs): # inputs
+        all_predict = inputs[1].asnumpy() # predict
+        all_label = inputs[2].asnumpy() # label
+        self.true_labels.extend(all_label.flatten().tolist())
+        self.pred_probs.extend(all_predict.flatten().tolist())
+
+    def eval(self):
+        if len(self.true_labels) != len(self.pred_probs):
+            raise RuntimeError(
+                'true_labels.size is not equal to pred_probs.size()')
+
+        auc = roc_auc_score(self.true_labels, self.pred_probs)
+        print("====" * 20 + " auc_metric  end")
+        print("====" * 20 + " auc: {}".format(auc))
+        return auc
diff --git a/example/wide_and_deep/src/process_data.py b/example/wide_and_deep/src/process_data.py
new file mode 100644
index 0000000000000000000000000000000000000000..37b38b0bbbbed76530318a7693eabbf1e2dcd366
--- /dev/null
+++ b/example/wide_and_deep/src/process_data.py
@@ -0,0 +1,268 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============================================================================
+"""
+Criteo data process
+"""
+
+import os
+import pickle
+import collections
+import argparse
+
+import numpy as np
+import pandas as pd
+
+TRAIN_LINE_COUNT = 45840617
+TEST_LINE_COUNT = 6042135
+
+class CriteoStatsDict():
+    """create data dict"""
+    def __init__(self):
+        self.field_size = 39 # value_1-13; cat_1-26;
+        self.val_cols = ["val_{}".format(i+1) for i in range(13)]
+        self.cat_cols = ["cat_{}".format(i+1) for i in range(26)]
+        #
+        self.val_min_dict = {col: 0 for col in self.val_cols}
+        self.val_max_dict = {col: 0 for col in self.val_cols}
+        self.cat_count_dict = {col: collections.defaultdict(int) for col in self.cat_cols}
+        #
+        self.oov_prefix = "OOV_"
+
+        self.cat2id_dict = {}
+        self.cat2id_dict.update({col: i for i, col in enumerate(self.val_cols)})
+        self.cat2id_dict.update({self.oov_prefix + col: i + len(self.val_cols) for i, col in enumerate(self.cat_cols)})
+    #
+    def stats_vals(self, val_list):
+        """vals status"""
+        assert len(val_list) == len(self.val_cols)
+        def map_max_min(i, val):
+            key = self.val_cols[i]
+            if val != "":
+                if float(val) > self.val_max_dict[key]:
+                    self.val_max_dict[key] = float(val)
+                if float(val) < self.val_min_dict[key]:
+                    self.val_min_dict[key] = float(val)
+            #
+        for i, val in enumerate(val_list):
+            map_max_min(i, val)
+    #
+    def stats_cats(self, cat_list):
+        assert len(cat_list) == len(self.cat_cols)
+        def map_cat_count(i, cat):
+            key = self.cat_cols[i]
+            self.cat_count_dict[key][cat] += 1
+        #
+        for i, cat in enumerate(cat_list):
+            map_cat_count(i, cat)
+    #
+    def save_dict(self, output_path, prefix=""):
+        with open(os.path.join(output_path, "{}val_max_dict.pkl".format(prefix)), "wb") as file_wrt:
+            pickle.dump(self.val_max_dict, file_wrt)
+        with open(os.path.join(output_path, "{}val_min_dict.pkl".format(prefix)), "wb") as file_wrt:
+            pickle.dump(self.val_min_dict, file_wrt)
+        with open(os.path.join(output_path, "{}cat_count_dict.pkl".format(prefix)), "wb") as file_wrt:
+            pickle.dump(self.cat_count_dict, file_wrt)
+    #
+    def load_dict(self, dict_path, prefix=""):
+        with open(os.path.join(dict_path, "{}val_max_dict.pkl".format(prefix)), "rb") as file_wrt:
+            self.val_max_dict = pickle.load(file_wrt)
+        with open(os.path.join(dict_path, "{}val_min_dict.pkl".format(prefix)), "rb") as file_wrt:
+            self.val_min_dict = pickle.load(file_wrt)
+        with open(os.path.join(dict_path, "{}cat_count_dict.pkl".format(prefix)), "rb") as file_wrt:
+            self.cat_count_dict = pickle.load(file_wrt)
+        print("val_max_dict.items()[:50]: {}".format(list(self.val_max_dict.items())))
+        print("val_min_dict.items()[:50]: {}".format(list(self.val_min_dict.items())))
+        #
+    #
+    def get_cat2id(self, threshold=100):
+        """get cat to id"""
+        # before_all_count = 0
+        # after_all_count = 0
+        for key, cat_count_d in self.cat_count_dict.items():
+            new_cat_count_d = dict(filter(lambda x: x[1] > threshold, cat_count_d.items()))
+            for cat_str, _ in new_cat_count_d.items():
+                self.cat2id_dict[key + "_" + cat_str] = len(self.cat2id_dict)
+        # print("before_all_count: {}".format(before_all_count)) # before_all_count: 33762577
+        # print("after_all_count: {}".format(after_all_count)) # after_all_count: 184926
+        print("cat2id_dict.size: {}".format(len(self.cat2id_dict)))
+        print("cat2id_dict.items()[:50]: {}".format(self.cat2id_dict.items()[:50]))
+    #
+    def map_cat2id(self, values, cats):
+        """map cat to id"""
+        def minmax_sclae_value(i, val):
+            # min_v = float(self.val_min_dict["val_{}".format(i+1)])
+            max_v = float(self.val_max_dict["val_{}".format(i + 1)])
+            # return (float(val) - min_v) * 1.0 / (max_v - min_v)
+            return float(val) * 1.0 / max_v
+
+        id_list = []
+        weight_list = []
+        for i, val in enumerate(values):
+            if val == "":
+                id_list.append(i)
+                weight_list.append(0)
+            else:
+                key = "val_{}".format(i + 1)
+                id_list.append(self.cat2id_dict[key])
+                weight_list.append(minmax_sclae_value(i, float(val)))
+        #
+        for i, cat_str in enumerate(cats):
+            key = "cat_{}".format(i + 1) + "_" + cat_str
+            if key in self.cat2id_dict:
+                id_list.append(self.cat2id_dict[key])
+            else:
+                id_list.append(self.cat2id_dict[self.oov_prefix + "cat_{}".format(i + 1)])
+            weight_list.append(1.0)
+        return id_list, weight_list
+    #
+
+
+
+def mkdir_path(file_path):
+    if not os.path.exists(file_path):
+        os.makedirs(file_path)
+  #
+
+def statsdata(data_file_path, output_path, criteo_stats):
+    """data status"""
+    with open(data_file_path, encoding="utf-8") as file_in:
+        errorline_list = []
+        count = 0
+        for line in file_in:
+            count += 1
+            line = line.strip("\n")
+            items = line.strip("\t")
+            if len(items) != 40:
+                errorline_list.append(count)
+                print("line: {}".format(line))
+                continue
+            if count % 1000000 == 0:
+                print("Have handle {}w lines.".format(count//10000))
+            # if count % 5000000 == 0:
+            #    print("Have handle {}w lines.".format(count//10000))
+            # label = items[0]
+            values = items[1:14]
+            cats = items[14:]
+            assert len(values) == 13, "value.size: {}".format(len(values))
+            assert len(cats) == 26, "cat.size: {}".format(len(cats))
+            criteo_stats.stats_vals(values)
+            criteo_stats.stats_cats(cats)
+    criteo_stats.save_dict(output_path)
+    #
+
+
+def add_write(file_path, wr_str):
+    with open(file_path, "a", encoding="utf-8") as file_out:
+        file_out.write(wr_str + "\n")
+#
+
+
+def random_split_trans2h5(in_file_path, output_path, criteo_stats, part_rows=2000000, test_size=0.1, seed=2020):
+    """random split trans2h5"""
+    test_size = int(TRAIN_LINE_COUNT * test_size)
+    # train_size = TRAIN_LINE_COUNT - test_size
+    all_indices = [i for i in range(TRAIN_LINE_COUNT)]
+    np.random.seed(seed)
+    np.random.shuffle(all_indices)
+    print("all_indices.size: {}".format(len(all_indices)))
+    # lines_count_dict = collections.defaultdict(int)
+    test_indices_set = set(all_indices[:test_size])
+    print("test_indices_set.size: {}".format(len(test_indices_set)))
+    print("------" * 10 + "\n" * 2)
+
+    train_feature_file_name = os.path.join(output_path, "train_input_part_{}.h5")
+    train_label_file_name = os.path.join(output_path, "train_output_part_{}.h5")
+    test_feature_file_name = os.path.join(output_path, "test_input_part_{}.h5")
+    test_label_file_name = os.path.join(output_path, "test_input_part_{}.h5")
+    train_feature_list = []
+    train_label_list = []
+    test_feature_list = []
+    test_label_list = []
+    with open(in_file_path, encoding="utf-8") as file_in:
+        count = 0
+        train_part_number = 0
+        test_part_number = 0
+        for i, line in enumerate(file_in):
+            count += 1
+            if count % 1000000 == 0:
+                print("Have handle {}w lines.".format(count // 10000))
+            line = line.strip("\n")
+            items = line.split("\t")
+            if len(items) != 40:
+                continue
+            label = float(items[0])
+            values = items[1:14]
+            cats = items[14:]
+            assert len(values) == 13, "value.size: {}".format(len(values))
+            assert len(cats) == 26, "cat.size: {}".format(len(cats))
+            ids, wts = criteo_stats.map_cat2id(values, cats)
+            if i not in test_indices_set:
+                train_feature_list.append(ids + wts)
+                train_label_list.append(label)
+            else:
+                test_feature_list.append(ids + wts)
+                test_label_list.append(label)
+            if train_label_list and (len(train_label_list) % part_rows == 0):
+                pd.DataFrame(np.asarray(train_feature_list)).to_hdf(train_feature_file_name.format(train_part_number),
+                                                                    key="fixed")
+                pd.DataFrame(np.asarray(train_label_list)).to_hdf(train_label_file_name.format(train_part_number),
+                                                                  key="fixed")
+                train_feature_list = []
+                train_label_list = []
+                train_part_number += 1
+            if test_label_list and (len(test_label_list) % part_rows == 0):
+                pd.DataFrame(np.asarray(test_feature_list)).to_hdf(test_feature_file_name.format(test_part_number),
+                                                                   key="fixed")
+                pd.DataFrame(np.asarray(test_label_list)).to_hdf(test_label_file_name.format(test_part_number),
+                                                                 key="fixed")
+                test_feature_list = []
+                test_label_list = []
+                test_part_number += 1
+        #
+        if train_label_list:
+            pd.DataFrame(np.asarray(train_feature_list)).to_hdf(train_feature_file_name.format(train_part_number),
+                                                                key="fixed")
+            pd.DataFrame(np.asarray(train_label_list)).to_hdf(train_label_file_name.format(train_part_number),
+                                                              key="fixed")
+        if test_label_list:
+            pd.DataFrame(np.asarray(test_feature_list)).to_hdf(test_feature_file_name.format(test_part_number),
+                                                               key="fixed")
+            pd.DataFrame(np.asarray(test_label_list)).to_hdf(test_label_file_name.format(test_part_number),
+                                                             key="fixed")
+#
+
+
+
+if __name__ == "__main__":
+
+    parser = argparse.ArgumentParser(description="Get and Process datasets")
+    parser.add_argument("--raw_data_path", default="/opt/npu/data/origin_criteo_data/", help="The path to save dataset")
+    parser.add_argument("--output_path", default="/opt/npu/data/origin_criteo_data/h5_data/",
+                        help="The path to save dataset")
+    args, _ = parser.parse_known_args()
+    base_path = args.raw_data_path
+    criteo_stat = CriteoStatsDict()
+    # step 1, stats the vocab and normalize value
+    datafile_path = base_path + "train_small.txt"
+    stats_out_path = base_path + "stats_dict/"
+    mkdir_path(stats_out_path)
+    statsdata(datafile_path, stats_out_path, criteo_stat)
+    print("------" * 10)
+    criteo_stat.load_dict(dict_path=stats_out_path, prefix="")
+    criteo_stat.get_cat2id(threshold=100)
+    # step 2, transform data trans2h5; version 2: np.random.shuffle
+    infile_path = base_path + "train_small.txt"
+    mkdir_path(args.output_path)
+    random_split_trans2h5(infile_path, args.output_path, criteo_stat, part_rows=2000000, test_size=0.1, seed=2020)
diff --git a/example/wide_and_deep/src/wide_and_deep.py b/example/wide_and_deep/src/wide_and_deep.py
new file mode 100644
index 0000000000000000000000000000000000000000..7772431ab330428163b68d7d8f512b185dfcf398
--- /dev/null
+++ b/example/wide_and_deep/src/wide_and_deep.py
@@ -0,0 +1,311 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============================================================================
+"""wide and deep model"""
+from mindspore import nn
+from mindspore import Tensor, Parameter, ParameterTuple
+import mindspore.common.dtype as mstype
+from mindspore.ops import functional as F
+from mindspore.ops import composite as C
+from mindspore.ops import operations as P
+# from mindspore.nn import Dropout
+from mindspore.nn.optim import Adam, FTRL
+# from mindspore.nn.metrics import Metric
+from mindspore.common.initializer import Uniform, initializer
+# from mindspore.train.callback import ModelCheckpoint, CheckpointConfig
+import numpy as np
+
+np_type = np.float32
+ms_type = mstype.float32
+
+
+def init_method(method, shape, name, max_val=1.0):
+    '''
+    parameter init method
+    '''
+    if method in ['uniform']:
+        params = Parameter(initializer(
+            Uniform(max_val), shape, ms_type), name=name)
+    elif method == "one":
+        params = Parameter(initializer("ones", shape, ms_type), name=name)
+    elif method == 'zero':
+        params = Parameter(initializer("zeros", shape, ms_type), name=name)
+    elif method == "normal":
+        params = Parameter(Tensor(np.random.normal(
+            loc=0.0, scale=0.01, size=shape).astype(dtype=np_type)), name=name)
+    return params
+
+
+def init_var_dict(init_args, in_vars):
+    '''
+    var init function
+    '''
+    var_map = {}
+    _, _max_val = init_args
+    for _, iterm in enumerate(in_vars):
+        key, shape, method = iterm
+        if key not in var_map.keys():
+            if method in ['random', 'uniform']:
+                var_map[key] = Parameter(initializer(
+                    Uniform(_max_val), shape, ms_type), name=key)
+            elif method == "one":
+                var_map[key] = Parameter(initializer(
+                    "ones", shape, ms_type), name=key)
+            elif method == "zero":
+                var_map[key] = Parameter(initializer(
+                    "zeros", shape, ms_type), name=key)
+            elif method == 'normal':
+                var_map[key] = Parameter(Tensor(np.random.normal(
+                    loc=0.0, scale=0.01, size=shape).astype(dtype=np_type)), name=key)
+    return var_map
+
+
+class DenseLayer(nn.Cell):
+    """
+    Dense Layer for Deep Layer of WideDeep Model;
+    Containing: activation, matmul, bias_add;
+    Args:
+    """
+
+    def __init__(self, input_dim, output_dim, weight_bias_init, act_str,
+                 keep_prob=0.7, scale_coef=1.0, convert_dtype=True):
+        super(DenseLayer, self).__init__()
+        weight_init, bias_init = weight_bias_init
+        self.weight = init_method(
+            weight_init, [input_dim, output_dim], name="weight")
+        self.bias = init_method(bias_init, [output_dim], name="bias")
+        self.act_func = self._init_activation(act_str)
+        self.matmul = P.MatMul(transpose_b=False)
+        self.bias_add = P.BiasAdd()
+        self.cast = P.Cast()
+        #self.dropout = Dropout(keep_prob=keep_prob)
+        self.mul = P.Mul()
+        self.realDiv = P.RealDiv()
+        self.scale_coef = scale_coef
+        self.convert_dtype = convert_dtype
+
+    def _init_activation(self, act_str):
+        act_str = act_str.lower()
+        if act_str == "relu":
+            act_func = P.ReLU()
+        elif act_str == "sigmoid":
+            act_func = P.Sigmoid()
+        elif act_str == "tanh":
+            act_func = P.Tanh()
+        return act_func
+
+    def construct(self, x):
+        x = self.act_func(x)
+        # if self.training:
+        #    x = self.dropout(x)
+        x = self.mul(x, self.scale_coef)
+        if self.convert_dtype:
+            x = self.cast(x, mstype.float16)
+            weight = self.cast(self.weight, mstype.float16)
+            wx = self.matmul(x, weight)
+            wx = self.cast(wx, mstype.float32)
+        else:
+            wx = self.matmul(x, self.weight)
+        wx = self.realDiv(wx, self.scale_coef)
+        output = self.bias_add(wx, self.bias)
+        return output
+
+
+class WideDeepModel(nn.Cell):
+    """
+        From paper: " Wide & Deep Learning for Recommender Systems"
+        Args:
+            config (Class): The default config of Wide&Deep
+    """
+
+    def __init__(self, config):
+        super(WideDeepModel, self).__init__()
+        self.batch_size = config.batch_size
+        self.field_size = config.field_size
+        self.vocab_size = config.vocab_size
+        self.emb_dim = config.emb_dim
+        self.deep_layer_dims_list = config.deep_layer_dim
+        self.deep_layer_act = config.deep_layer_act
+        self.init_args = config.init_args
+        self.weight_init, self.bias_init = config.weight_bias_init
+        self.weight_bias_init = config.weight_bias_init
+        self.emb_init = config.emb_init
+        self.drop_out = config.dropout_flag
+        self.keep_prob = config.keep_prob
+        self.deep_input_dims = self.field_size * self.emb_dim
+        self.layer_dims = self.deep_layer_dims_list + [1]
+        self.all_dim_list = [self.deep_input_dims] + self.layer_dims
+
+        init_acts = [('Wide_w', [self.vocab_size, 1], self.emb_init),
+                     ('V_l2', [self.vocab_size, self.emb_dim], self.emb_init),
+                     ('Wide_b', [1], self.emb_init)]
+        var_map = init_var_dict(self.init_args, init_acts)
+        self.wide_w = var_map["Wide_w"]
+        self.wide_b = var_map["Wide_b"]
+        self.embedding_table = var_map["V_l2"]
+        self.dense_layer_1 = DenseLayer(self.all_dim_list[0],
+                                        self.all_dim_list[1],
+                                        self.weight_bias_init,
+                                        self.deep_layer_act, convert_dtype=True)
+        self.dense_layer_2 = DenseLayer(self.all_dim_list[1],
+                                        self.all_dim_list[2],
+                                        self.weight_bias_init,
+                                        self.deep_layer_act, convert_dtype=True)
+        self.dense_layer_3 = DenseLayer(self.all_dim_list[2],
+                                        self.all_dim_list[3],
+                                        self.weight_bias_init,
+                                        self.deep_layer_act, convert_dtype=True)
+        self.dense_layer_4 = DenseLayer(self.all_dim_list[3],
+                                        self.all_dim_list[4],
+                                        self.weight_bias_init,
+                                        self.deep_layer_act, convert_dtype=True)
+        self.dense_layer_5 = DenseLayer(self.all_dim_list[4],
+                                        self.all_dim_list[5],
+                                        self.weight_bias_init,
+                                        self.deep_layer_act, convert_dtype=True)
+
+        self.gather_v2 = P.GatherV2()
+        self.mul = P.Mul()
+        self.reduce_sum = P.ReduceSum(keep_dims=False)
+        self.reshape = P.Reshape()
+        self.square = P.Square()
+        self.shape = P.Shape()
+        self.tile = P.Tile()
+        self.concat = P.Concat(axis=1)
+        self.cast = P.Cast()
+
+    def construct(self, id_hldr, wt_hldr):
+        """
+        Args:
+            id_hldr: batch ids;
+            wt_hldr: batch weights;
+        """
+        mask = self.reshape(wt_hldr, (self.batch_size, self.field_size, 1))
+        # Wide layer
+        wide_id_weight = self.gather_v2(self.wide_w, id_hldr, 0)
+        wx = self.mul(wide_id_weight, mask)
+        wide_out = self.reshape(self.reduce_sum(wx, 1) + self.wide_b, (-1, 1))
+        # Deep layer
+        deep_id_embs = self.gather_v2(self.embedding_table, id_hldr, 0)
+        vx = self.mul(deep_id_embs, mask)
+        deep_in = self.reshape(vx, (-1, self.field_size * self.emb_dim))
+        deep_in = self.dense_layer_1(deep_in)
+        deep_in = self.dense_layer_2(deep_in)
+        deep_in = self.dense_layer_3(deep_in)
+        deep_in = self.dense_layer_4(deep_in)
+        deep_out = self.dense_layer_5(deep_in)
+        out = wide_out + deep_out
+        return out, self.embedding_table
+
+
+class NetWithLossClass(nn.Cell):
+
+    """"
+    Provide WideDeep training loss through network.
+    Args:
+        network (Cell): The training network
+        config (Class): WideDeep config
+    """
+
+    def __init__(self, network, config):
+        super(NetWithLossClass, self).__init__(auto_prefix=False)
+        self.network = network
+        self.l2_coef = config.l2_coef
+        self.loss = P.SigmoidCrossEntropyWithLogits()
+        self.square = P.Square()
+        self.reduceMean_false = P.ReduceMean(keep_dims=False)
+        self.reduceSum_false = P.ReduceSum(keep_dims=False)
+
+    def construct(self, batch_ids, batch_wts, label):
+        predict, embedding_table = self.network(batch_ids, batch_wts)
+        log_loss = self.loss(predict, label)
+        wide_loss = self.reduceMean_false(log_loss)
+        l2_loss_v = self.reduceSum_false(self.square(embedding_table)) / 2
+        deep_loss = self.reduceMean_false(log_loss) + self.l2_coef * l2_loss_v
+
+        return wide_loss, deep_loss
+
+
+class IthOutputCell(nn.Cell):
+    def __init__(self, network, output_index):
+        super(IthOutputCell, self).__init__()
+        self.network = network
+        self.output_index = output_index
+
+    def construct(self, x1, x2, x3):
+        predict = self.network(x1, x2, x3)[self.output_index]
+        return predict
+
+
+class TrainStepWrap(nn.Cell):
+    """
+    Encapsulation class of WideDeep network training.
+    Append Adam and FTRL optimizers to the training network after that construct
+    function can be called to create the backward graph.
+    Args:
+        network (Cell): the training network. Note that loss function should have been added.
+        sens (Number): The adjust parameter. Default: 1000.0
+    """
+
+    def __init__(self, network, sens=1000.0):
+        super(TrainStepWrap, self).__init__()
+        self.network = network
+        self.network.set_train()
+        self.trainable_params = network.trainable_params()
+        weights_w = []
+        weights_d = []
+        for params in self.trainable_params:
+            if 'wide' in params.name:
+                weights_w.append(params)
+            else:
+                weights_d.append(params)
+        self.weights_w = ParameterTuple(weights_w)
+        self.weights_d = ParameterTuple(weights_d)
+        self.optimizer_w = FTRL(learning_rate=1e-2, params=self.weights_w,
+                                l1=1e-8, l2=1e-8, initial_accum=1.0)
+        self.optimizer_d = Adam(
+            self.weights_d, learning_rate=3.5e-4, eps=1e-8, loss_scale=sens)
+        self.hyper_map = C.HyperMap()
+        self.grad_w = C.GradOperation('grad_w', get_by_list=True,
+                                      sens_param=True)
+        self.grad_d = C.GradOperation('grad_d', get_by_list=True,
+                                      sens_param=True)
+        self.sens = sens
+        self.loss_net_w = IthOutputCell(network, output_index=0)
+        self.loss_net_d = IthOutputCell(network, output_index=1)
+
+    def construct(self, batch_ids, batch_wts, label):
+        weights_w = self.weights_w
+        weights_d = self.weights_d
+        loss_w, loss_d = self.network(batch_ids, batch_wts, label)
+        sens_w = P.Fill()(P.DType()(loss_w), P.Shape()(loss_w), self.sens)
+        sens_d = P.Fill()(P.DType()(loss_d), P.Shape()(loss_d), self.sens)
+        grads_w = self.grad_w(self.loss_net_w, weights_w)(batch_ids, batch_wts,
+                                                          label, sens_w)
+        grads_d = self.grad_d(self.loss_net_d, weights_d)(batch_ids, batch_wts,
+                                                          label, sens_d)
+        return F.depend(loss_w, self.optimizer_w(grads_w)), F.depend(loss_d,
+                                                                     self.optimizer_d(grads_d))
+
+
+class PredictWithSigmoid(nn.Cell):
+    def __init__(self, network):
+        super(PredictWithSigmoid, self).__init__()
+        self.network = network
+        self.sigmoid = P.Sigmoid()
+
+    def construct(self, batch_ids, batch_wts, labels):
+        logits, _, _, = self.network(batch_ids, batch_wts)
+        pred_probs = self.sigmoid(logits)
+        return logits, pred_probs, labels
diff --git a/example/wide_and_deep/test.py b/example/wide_and_deep/test.py
new file mode 100644
index 0000000000000000000000000000000000000000..54969e7c945e05ec3f3040bfaaedca4cfbb2e2bf
--- /dev/null
+++ b/example/wide_and_deep/test.py
@@ -0,0 +1,94 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============================================================================
+
+""" test_training """
+
+import os
+
+from mindspore import Model, context
+from mindspore.train.serialization import load_checkpoint, load_param_into_net
+
+from src.wide_and_deep import PredictWithSigmoid, TrainStepWrap, NetWithLossClass, WideDeepModel
+from src.callbacks import LossCallBack, EvalCallBack
+from src.datasets import create_dataset
+from src.metrics import AUCMetric
+from src.config import WideDeepConfig
+
+context.set_context(mode=context.GRAPH_MODE, device_target="Davinci",
+                    save_graphs=True)
+
+
+def get_WideDeep_net(config):
+    WideDeep_net = WideDeepModel(config)
+
+    loss_net = NetWithLossClass(WideDeep_net, config)
+    train_net = TrainStepWrap(loss_net)
+    eval_net = PredictWithSigmoid(WideDeep_net)
+
+    return train_net, eval_net
+
+
+class ModelBuilder():
+    """
+    Wide and deep model builder
+    """
+    def __init__(self):
+        pass
+
+    def get_hook(self):
+        pass
+
+    def get_train_hook(self):
+        hooks = []
+        callback = LossCallBack()
+        hooks.append(callback)
+
+        if int(os.getenv('DEVICE_ID')) == 0:
+            pass
+        return hooks
+
+    def get_net(self, config):
+        return get_WideDeep_net(config)
+
+
+def test_eval(config):
+    """
+    test evaluate
+    """
+    data_path = config.data_path
+    batch_size = config.batch_size
+    ds_eval = create_dataset(data_path, train_mode=False, epochs=2,
+                             batch_size=batch_size)
+    print("ds_eval.size: {}".format(ds_eval.get_dataset_size()))
+
+    net_builder = ModelBuilder()
+    train_net, eval_net = net_builder.get_net(config)
+
+    param_dict = load_checkpoint(config.ckpt_path)
+    load_param_into_net(eval_net, param_dict)
+
+    auc_metric = AUCMetric()
+    model = Model(train_net, eval_network=eval_net, metrics={"auc": auc_metric})
+
+    eval_callback = EvalCallBack(model, ds_eval, auc_metric, config)
+
+    model.eval(ds_eval, callbacks=eval_callback)
+
+
+if __name__ == "__main__":
+    widedeep_config = WideDeepConfig()
+    widedeep_config.argparse_init()
+
+    test_eval(widedeep_config.widedeep)
diff --git a/example/wide_and_deep/train.py b/example/wide_and_deep/train.py
new file mode 100644
index 0000000000000000000000000000000000000000..b3996e01cb5dbc67d392d58ac74758c0c8c0da8a
--- /dev/null
+++ b/example/wide_and_deep/train.py
@@ -0,0 +1,85 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" test_training """
+import os
+from mindspore import Model, context
+from mindspore.train.callback import ModelCheckpoint, CheckpointConfig
+
+from src.wide_and_deep import PredictWithSigmoid, TrainStepWrap, NetWithLossClass, WideDeepModel
+from src.callbacks import LossCallBack
+from src.datasets import create_dataset
+from src.config import WideDeepConfig
+
+context.set_context(mode=context.GRAPH_MODE, device_target="Ascend", save_graphs=True)
+
+
+def get_WideDeep_net(configure):
+    WideDeep_net = WideDeepModel(configure)
+
+    loss_net = NetWithLossClass(WideDeep_net, configure)
+    train_net = TrainStepWrap(loss_net)
+    eval_net = PredictWithSigmoid(WideDeep_net)
+
+    return train_net, eval_net
+
+
+class ModelBuilder():
+    """
+    Build the model.
+    """
+    def __init__(self):
+        pass
+
+    def get_hook(self):
+        pass
+
+    def get_train_hook(self):
+        hooks = []
+        callback = LossCallBack()
+        hooks.append(callback)
+        if int(os.getenv('DEVICE_ID')) == 0:
+            pass
+        return hooks
+
+    def get_net(self, configure):
+        return get_WideDeep_net(configure)
+
+
+def test_train(configure):
+    """
+    test_train
+    """
+    data_path = configure.data_path
+    batch_size = configure.batch_size
+    epochs = configure.epochs
+    ds_train = create_dataset(data_path, train_mode=True, epochs=epochs, batch_size=batch_size)
+    print("ds_train.size: {}".format(ds_train.get_dataset_size()))
+
+    net_builder = ModelBuilder()
+    train_net, _ = net_builder.get_net(configure)
+    train_net.set_train()
+
+    model = Model(train_net)
+    callback = LossCallBack(config=configure)
+    ckptconfig = CheckpointConfig(save_checkpoint_steps=1,
+                                  keep_checkpoint_max=5)
+    ckpoint_cb = ModelCheckpoint(prefix='widedeep_train', directory=configure.ckpt_path, config=ckptconfig)
+    model.train(epochs, ds_train, callbacks=[callback, ckpoint_cb])
+
+
+if __name__ == "__main__":
+    config = WideDeepConfig()
+    config.argparse_init()
+
+    test_train(config)
diff --git a/example/wide_and_deep/train_and_test.py b/example/wide_and_deep/train_and_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..5d9832b84bc835860cacf5edf25cc754cba151ac
--- /dev/null
+++ b/example/wide_and_deep/train_and_test.py
@@ -0,0 +1,97 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" test_training """
+import os
+
+from mindspore import Model, context
+from mindspore.train.callback import ModelCheckpoint, CheckpointConfig
+
+from src.wide_and_deep import PredictWithSigmoid, TrainStepWrap, NetWithLossClass, WideDeepModel
+from src.callbacks import LossCallBack, EvalCallBack
+from src.datasets import create_dataset
+from src.metrics import AUCMetric
+from src.config import WideDeepConfig
+
+context.set_context(mode=context.GRAPH_MODE, device_target="Davinci")
+
+
+def get_WideDeep_net(config):
+    WideDeep_net = WideDeepModel(config)
+
+    loss_net = NetWithLossClass(WideDeep_net, config)
+    train_net = TrainStepWrap(loss_net)
+    eval_net = PredictWithSigmoid(WideDeep_net)
+
+    return train_net, eval_net
+
+
+class ModelBuilder():
+    """
+    ModelBuilder
+    """
+    def __init__(self):
+        pass
+
+    def get_hook(self):
+        pass
+
+    def get_train_hook(self):
+        hooks = []
+        callback = LossCallBack()
+        hooks.append(callback)
+
+        if int(os.getenv('DEVICE_ID')) == 0:
+            pass
+        return hooks
+
+    def get_net(self, config):
+        return get_WideDeep_net(config)
+
+
+def test_train_eval(config):
+    """
+    test_train_eval
+    """
+    data_path = config.data_path
+    batch_size = config.batch_size
+    epochs = config.epochs
+    ds_train = create_dataset(data_path, train_mode=True, epochs=epochs, batch_size=batch_size)
+    ds_eval = create_dataset(data_path, train_mode=False, epochs=epochs + 1, batch_size=batch_size)
+    print("ds_train.size: {}".format(ds_train.get_dataset_size()))
+    print("ds_eval.size: {}".format(ds_eval.get_dataset_size()))
+
+    net_builder = ModelBuilder()
+
+    train_net, eval_net = net_builder.get_net(config)
+    train_net.set_train()
+    auc_metric = AUCMetric()
+
+    model = Model(train_net, eval_network=eval_net, metrics={"auc": auc_metric})
+
+    eval_callback = EvalCallBack(model, ds_eval, auc_metric, config)
+
+    callback = LossCallBack(config=config)
+    ckptconfig = CheckpointConfig(save_checkpoint_steps=1, keep_checkpoint_max=5)
+    ckpoint_cb = ModelCheckpoint(prefix='widedeep_train', directory=config.ckpt_path, config=ckptconfig)
+
+    out = model.eval(ds_eval)
+    print("=====" * 5 + "model.eval() initialized: {}".format(out))
+    model.train(epochs, ds_train, callbacks=[eval_callback, callback, ckpoint_cb])
+
+
+if __name__ == "__main__":
+    wide_deep_config = WideDeepConfig()
+    wide_deep_config.argparse_init()
+
+    test_train_eval(wide_deep_config)
diff --git a/example/wide_and_deep/train_and_test_multinpu.py b/example/wide_and_deep/train_and_test_multinpu.py
new file mode 100644
index 0000000000000000000000000000000000000000..9e4b99f5462b25f22c99bba60b3a5c72c9c55950
--- /dev/null
+++ b/example/wide_and_deep/train_and_test_multinpu.py
@@ -0,0 +1,101 @@
+# Copyright 2020 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============================================================================
+"""train_multinpu."""
+
+
+import os
+import sys
+import numpy as np
+from mindspore import Model, context
+from mindspore.train.callback import ModelCheckpoint, CheckpointConfig, TimeMonitor
+from mindspore.train import ParallelMode
+from mindspore.communication.management import get_rank, get_group_size, init
+
+from src.wide_and_deep import PredictWithSigmoid, TrainStepWrap, NetWithLossClass, WideDeepModel
+from src.callbacks import LossCallBack, EvalCallBack
+from src.datasets import create_dataset
+from src.metrics import AUCMetric
+from src.config import WideDeepConfig
+
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+context.set_context(mode=GRAPH_MODE, device_target="Davinci", save_graph=True)
+context.set_auto_parallel_context(parallel_mode=ParallelMode.DATA_PARALLEL, mirror_mean=True)
+init()
+
+
+
+def get_WideDeep_net(config):
+    WideDeep_net = WideDeepModel(config)
+    loss_net = NetWithLossClass(WideDeep_net, config)
+    train_net = TrainStepWrap(loss_net)
+    eval_net = PredictWithSigmoid(WideDeep_net)
+    return train_net, eval_net
+
+
+class ModelBuilder():
+    """
+    ModelBuilder
+    """
+    def __init__(self):
+        pass
+
+    def get_hook(self):
+        pass
+
+    def get_train_hook(self):
+        hooks = []
+        callback = LossCallBack()
+        hooks.append(callback)
+        if int(os.getenv('DEVICE_ID')) == 0:
+            pass
+        return hooks
+
+    def get_net(self, config):
+        return get_WideDeep_net(config)
+
+
+def test_train_eval():
+    """
+    test_train_eval
+    """
+    np.random.seed(1000)
+    config = WideDeepConfig
+    data_path = Config.data_path
+    batch_size = config.batch_size
+    epochs = config.epochs
+    print("epochs is {}".format(epochs))
+    ds_train = create_dataset(data_path, train_mode=True, epochs=epochs,
+                              batch_size=batch_size, rank_id=get_rank(), rank_size=get_group_size())
+    ds_eval = create_dataset(data_path, train_mode=False, epochs=epochs + 1,
+                             batch_size=batch_size, rank_id=get_rank(), rank_size=get_group_size())
+    print("ds_train.size: {}".format(ds_train.get_dataset_size()))
+    print("ds_eval.size: {}".format(ds_eval.get_dataset_size()))
+
+    net_builder = ModelBuilder()
+
+    train_net, eval_net = net_builder.get_net(config)
+    train_net.set_train()
+    auc_metric = AUCMetric()
+
+    model = Model(train_net, eval_network=eval_net, metrics={"auc": auc_metric})
+
+    eval_callback = EvalCallBack(model, ds_eval, auc_metric, config)
+
+    callback = LossCallBack(config=config)
+    ckptconfig = CheckpointConfig(save_checkpoint_steps=1, keep_checkpoint_max=5)
+    ckpoint_cb = ModelCheckpoint(prefix='widedeep_train',
+                                 directory=config.ckpt_path, config=ckptconfig)
+    model.train(epochs, ds_train,
+                callbacks=[TimeMonitor(ds_train.get_dataset_size()), eval_callback, callback, ckpoint_cb])