diff --git a/core/factory.py b/core/factory.py
index 2e2d013bd27eb73abd3b9ad5507b4e9373276a3b..ec6ec2ea28831c92ed59a3ada8169ce1dc433b5d 100755
--- a/core/factory.py
+++ b/core/factory.py
@@ -14,9 +14,7 @@
 
 import os
 import sys
-
 import yaml
-
 from paddlerec.core.utils import envs
 
 trainer_abs = os.path.join(
@@ -66,16 +64,9 @@ class TrainerFactory(object):
 
     @staticmethod
     def create(config):
-        _config = None
-        if os.path.isfile(config):
-            with open(config, 'r') as rb:
-                _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
-        else:
-            raise ValueError("paddlerec's config only support yaml")
-
+        _config = envs.load_yaml(config)
         envs.set_global_envs(_config)
         envs.update_workspace()
-
         trainer = TrainerFactory._build_trainer(config)
         return trainer
 
diff --git a/core/reader.py b/core/reader.py
index 555ae4ba83fa1fd0e1e57e110c199c9cedc1b1cb..6565471e117902fbc747bd4cbe9a79259466b42a 100755
--- a/core/reader.py
+++ b/core/reader.py
@@ -13,13 +13,11 @@
 # limitations under the License.
 
 from __future__ import print_function
-
 import abc
 import os
-
+from functools import reduce
 import paddle.fluid.incubate.data_generator as dg
 import yaml
-
 from paddlerec.core.utils import envs
 
 
@@ -28,12 +26,9 @@ class Reader(dg.MultiSlotDataGenerator):
 
     def __init__(self, config):
         dg.MultiSlotDataGenerator.__init__(self)
-
-        if os.path.isfile(config):
-            with open(config, 'r') as rb:
-                _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
-        else:
-            raise ValueError("reader config only support yaml")
+        _config = envs.load_yaml(config)
+        envs.set_global_envs(_config)
+        envs.update_workspace()
 
     @abc.abstractmethod
     def init(self):
@@ -50,11 +45,9 @@ class SlotReader(dg.MultiSlotDataGenerator):
 
     def __init__(self, config):
         dg.MultiSlotDataGenerator.__init__(self)
-        if os.path.isfile(config):
-            with open(config, 'r') as rb:
-                _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
-        else:
-            raise ValueError("reader config only support yaml")
+        _config = envs.load_yaml(config)
+        envs.set_global_envs(_config)
+        envs.update_workspace()
 
     def init(self, sparse_slots, dense_slots, padding=0):
         from operator import mul
diff --git a/core/trainer.py b/core/trainer.py
index b7c22ea89bd279a2e1e233edeb4d8cf11b8aa5c0..46b77b75366bd9269eaff11d7db12d1901f820b1 100755
--- a/core/trainer.py
+++ b/core/trainer.py
@@ -30,16 +30,12 @@ class Trainer(object):
 
     def __init__(self, config=None):
         self._status_processor = {}
-
         self._place = fluid.CPUPlace()
         self._exe = fluid.Executor(self._place)
-
         self._exector_context = {}
         self._context = {'status': 'uninit', 'is_exit': False}
         self._config_yaml = config
-
-        with open(config, 'r') as rb:
-            self._config = yaml.load(rb.read(), Loader=yaml.FullLoader)
+        self._config = envs.load_yaml(config)
 
     def regist_context_processor(self, status_name, processor):
         """
@@ -87,12 +83,8 @@ class Trainer(object):
 
 
 def user_define_engine(engine_yaml):
-    with open(engine_yaml, 'r') as rb:
-        _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
-    assert _config is not None
-
+    _config = envs.load_yaml(engine_yaml)
     envs.set_runtime_environs(_config)
-
     train_location = envs.get_global_env("engine.file")
     train_dirname = os.path.dirname(train_location)
     base_name = os.path.splitext(os.path.basename(train_location))[0]
diff --git a/core/utils/envs.py b/core/utils/envs.py
index f432950dfa50571cd307d4a370484e35ff77b408..79168e83b742466e27c1f7db846706185adfad06 100755
--- a/core/utils/envs.py
+++ b/core/utils/envs.py
@@ -203,3 +203,26 @@ def find_free_port():
 
     new_port = __free_port()
     return new_port
+
+
+def load_yaml(config):
+    vs = [int(i) for i in yaml.__version__.split(".")]
+    if vs[0] < 5:
+        use_full_loader = False
+    elif vs[0] > 5:
+        use_full_loader = True
+    else:
+        if vs[1] >= 1:
+            use_full_loader = True
+        else:
+            use_full_loader = False
+
+    if os.path.isfile(config):
+        with open(config, 'r') as rb:
+            if use_full_loader:
+                _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
+            else:
+                _config = yaml.load(rb.read())
+            return _config
+    else:
+        raise ValueError("config {} can not be supported".format(config))
diff --git a/core/utils/validation.py b/core/utils/validation.py
new file mode 100644
index 0000000000000000000000000000000000000000..6f800ed27fb936839143dc254dc139c017b91c54
--- /dev/null
+++ b/core/utils/validation.py
@@ -0,0 +1,151 @@
+# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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.
+
+from paddlerec.core.utils import envs
+
+
+class ValueFormat:
+    def __init__(self, type, value, value_handler):
+        self.type = type
+        self.value = value
+        self.value_handler = value_handler
+        self.help = help
+
+    def is_valid(self, name, value):
+        ret = self.is_type_valid(name, value)
+        if not ret:
+            return ret
+
+        ret = self.is_value_valid(name, value)
+        return ret
+
+    def is_type_valid(self, name, value):
+        if self.type == "int":
+            if not isinstance(value, int):
+                print("\nattr {} should be int, but {} now\n".format(
+                    name, self.type))
+                return False
+            return True
+
+        elif self.type == "str":
+            if not isinstance(value, str):
+                print("\nattr {} should be str, but {} now\n".format(
+                    name, self.type))
+                return False
+            return True
+
+        elif self.type == "strs":
+            if not isinstance(value, list):
+                print("\nattr {} should be list(str), but {} now\n".format(
+                    name, self.type))
+                return False
+            for v in value:
+                if not isinstance(v, str):
+                    print("\nattr {} should be list(str), but list({}) now\n".
+                          format(name, type(v)))
+                    return False
+            return True
+
+        elif self.type == "ints":
+            if not isinstance(value, list):
+                print("\nattr {} should be list(int), but {} now\n".format(
+                    name, self.type))
+                return False
+            for v in value:
+                if not isinstance(v, int):
+                    print("\nattr {} should be list(int), but list({}) now\n".
+                          format(name, type(v)))
+                    return False
+            return True
+
+        else:
+            print("\nattr {}'s type is {}, can not be supported now\n".format(
+                name, type(value)))
+            return False
+
+    def is_value_valid(self, name, value):
+        ret = self.value_handler(value)
+        return ret
+
+
+def in_value_handler(name, value, values):
+    if value not in values:
+        print("\nattr {}'s value is {}, but {} is expected\n".format(
+            name, value, values))
+        return False
+    return True
+
+
+def eq_value_handler(name, value, values):
+    if value != values:
+        print("\nattr {}'s value is {}, but == {} is expected\n".format(
+            name, value, values))
+        return False
+    return True
+
+
+def ge_value_handler(name, value, values):
+    if value < values:
+        print("\nattr {}'s value is {}, but >= {} is expected\n".format(
+            name, value, values))
+        return False
+    return True
+
+
+def le_value_handler(name, value, values):
+    if value > values:
+        print("\nattr {}'s value is {}, but <= {} is expected\n".format(
+            name, value, values))
+        return False
+    return True
+
+
+def register():
+    validations = {}
+    validations["train.workspace"] = ValueFormat("str", None, eq_value_handler)
+    validations["train.device"] = ValueFormat("str", ["cpu", "gpu"],
+                                              in_value_handler)
+    validations["train.epochs"] = ValueFormat("int", 1, ge_value_handler)
+    validations["train.engine"] = ValueFormat(
+        "str", ["single", "local_cluster", "cluster"], in_value_handler)
+
+    requires = [
+        "train.namespace", "train.device", "train.epochs", "train.engine"
+    ]
+    return validations, requires
+
+
+def yaml_validation(config):
+    all_checkers, require_checkers = register()
+
+    _config = envs.load_yaml(config)
+    flattens = envs.flatten_environs(_config)
+
+    for required in require_checkers:
+        if required not in flattens.keys():
+            print("\ncan not find {} in yaml, which is required\n".format(
+                required))
+            return False
+
+    for name, flatten in flattens.items():
+        checker = all_checkers.get(name, None)
+
+        if not checker:
+            continue
+
+        ret = checker.is_valid(name, flattens)
+        if not ret:
+            return False
+
+    return True
diff --git a/doc/design.md b/doc/design.md
index a442bd16a25301178538f482cd537a4ca23bc395..f88401aafc74a1b9910bdb082fa7a6cefa301359 100644
--- a/doc/design.md
+++ b/doc/design.md
@@ -197,13 +197,7 @@ class Reader(dg.MultiSlotDataGenerator):
 
     def __init__(self, config):
         dg.MultiSlotDataGenerator.__init__(self)
-
-        if os.path.isfile(config):
-            with open(config, 'r') as rb:
-                _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
-        else:
-            raise ValueError("reader config only support yaml")
-
+        _config = envs.load_yaml(config)
         envs.set_global_envs(_config)
         envs.update_workspace()
 
diff --git a/models/rank/dcn/data/get_slot_data.py b/models/rank/dcn/data/get_slot_data.py
index b1adb02817f1abbabfecd328e85aea3ee9136533..59a12010e767179e61a3e2d63480d3c1935afe77 100755
--- a/models/rank/dcn/data/get_slot_data.py
+++ b/models/rank/dcn/data/get_slot_data.py
@@ -12,18 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import math
-import sys
-import yaml
-from paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
-import math
 import os
 try:
     import cPickle as pickle
 except ImportError:
     import pickle
-from collections import Counter
-import os
 import paddle.fluid.incubate.data_generator as dg
 
 
@@ -31,12 +24,6 @@ class TrainReader(dg.MultiSlotDataGenerator):
     def __init__(self, config):
         dg.MultiSlotDataGenerator.__init__(self)
 
-        if os.path.isfile(config):
-            with open(config, 'r') as rb:
-                _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
-        else:
-            raise ValueError("reader config only support yaml")
-
     def init(self):
         self.cont_min_ = [0, -3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
         self.cont_max_ = [
diff --git a/models/rank/deepfm/data/get_slot_data.py b/models/rank/deepfm/data/get_slot_data.py
index c03b29248557de21ddb29c6a287045d9a7f1b500..0e281063b072276a00c3d7d4ca6c743e74c658cf 100755
--- a/models/rank/deepfm/data/get_slot_data.py
+++ b/models/rank/deepfm/data/get_slot_data.py
@@ -12,10 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import yaml, os
-
-from paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
+import os
 import paddle.fluid.incubate.data_generator as dg
 try:
     import cPickle as pickle
@@ -27,12 +24,6 @@ class TrainReader(dg.MultiSlotDataGenerator):
     def __init__(self, config):
         dg.MultiSlotDataGenerator.__init__(self)
 
-        if os.path.isfile(config):
-            with open(config, 'r') as rb:
-                _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
-        else:
-            raise ValueError("reader config only support yaml")
-
     def init(self):
         self.cont_min_ = [0, -3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
         self.cont_max_ = [
diff --git a/models/rank/dnn/model.py b/models/rank/dnn/model.py
index f4425e3d9853b7f7decbc45ff607c4173901d0cf..709a4f1f0c45033827495a733b68c823f33b8c18 100755
--- a/models/rank/dnn/model.py
+++ b/models/rank/dnn/model.py
@@ -32,7 +32,7 @@ class Model(ModelBase):
         self.sparse_feature_dim = envs.get_global_env(
             "hyper_parameters.sparse_feature_dim")
         self.learning_rate = envs.get_global_env(
-            "hyper_parameters.learning_rate")
+            "hyper_parameters.optimizer.learning_rate")
 
     def net(self, input, is_infer=False):
         self.sparse_inputs = self._sparse_data_var[1:]
diff --git a/models/rank/wide_deep/data/get_slot_data.py b/models/rank/wide_deep/data/get_slot_data.py
index ec37f9af9ebc1120294f965cc5845ce7bb3feaf0..11f1e386523f2fce9ea703a2217f6fa441572418 100755
--- a/models/rank/wide_deep/data/get_slot_data.py
+++ b/models/rank/wide_deep/data/get_slot_data.py
@@ -11,10 +11,7 @@
 # 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.
-import yaml, os
-
-from paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
+import os
 try:
     import cPickle as pickle
 except ImportError:
@@ -26,12 +23,6 @@ class TrainReader(dg.MultiSlotDataGenerator):
     def __init__(self, config):
         dg.MultiSlotDataGenerator.__init__(self)
 
-        if os.path.isfile(config):
-            with open(config, 'r') as rb:
-                _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
-        else:
-            raise ValueError("reader config only support yaml")
-
     def init(self):
         pass
 
diff --git a/models/rank/xdeepfm/data/get_slot_data.py b/models/rank/xdeepfm/data/get_slot_data.py
index 0ace10b4fada14d1c6b91dfbc4c80bf91737c28d..804f05ae1ac6388bad815539825828ddac9c4ed2 100755
--- a/models/rank/xdeepfm/data/get_slot_data.py
+++ b/models/rank/xdeepfm/data/get_slot_data.py
@@ -12,9 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import yaml, os
-from paddlerec.core.reader import Reader
-from paddlerec.core.utils import envs
+import os
 try:
     import cPickle as pickle
 except ImportError:
@@ -25,11 +23,6 @@ import paddle.fluid.incubate.data_generator as dg
 class TrainReader(dg.MultiSlotDataGenerator):
     def __init__(self, config):
         dg.MultiSlotDataGenerator.__init__(self)
-        if os.path.isfile(config):
-            with open(config, 'r') as rb:
-                _config = yaml.load(rb.read(), Loader=yaml.FullLoader)
-        else:
-            raise ValueError("reader config only support yaml")
 
     def init(self):
         pass
diff --git a/run.py b/run.py
index 594801fcdd5edb1821799ef53994674aec6a934d..9ded865dbb859450efe65aae703943cd156776da 100755
--- a/run.py
+++ b/run.py
@@ -14,7 +14,7 @@
 
 import os
 import subprocess
-
+import sys
 import argparse
 import tempfile
 import yaml
@@ -22,6 +22,7 @@ import copy
 from paddlerec.core.factory import TrainerFactory
 from paddlerec.core.utils import envs
 from paddlerec.core.utils import util
+from paddlerec.core.utils import validation
 
 engines = {}
 device = ["CPU", "GPU"]
@@ -48,9 +49,7 @@ def engine_registry():
 
 
 def get_inters_from_yaml(file, filters):
-    with open(file, 'r') as rb:
-        _envs = yaml.load(rb.read(), Loader=yaml.FullLoader)
-
+    _envs = envs.load_yaml(file)
     flattens = envs.flatten_environs(_envs)
     inters = {}
     for k, v in flattens.items():
@@ -197,9 +196,7 @@ def cluster_engine(args):
     def master():
         role = "MASTER"
         from paddlerec.core.engine.cluster.cluster import ClusterEngine
-        with open(args.backend, 'r') as rb:
-            _envs = yaml.load(rb.read(), Loader=yaml.FullLoader)
-
+        _envs = envs.load_yaml(args.backend)
         flattens = envs.flatten_environs(_envs, "_")
         flattens["engine_role"] = role
         flattens["engine_run_config"] = args.model
@@ -322,8 +319,9 @@ if __name__ == "__main__":
 
     model_name = args.model.split('.')[-1]
     args.model = get_abs_model(args.model)
+    if not validation.yaml_validation(args.model):
+        sys.exit(-1)
     engine_registry()
-
     which_engine = get_engine(args)
     engine = which_engine(args)
     engine.run()
diff --git a/setup.py b/setup.py
index 8ad1cc742434aa39513a1c618b56649c3530686a..87f9c00a8304e0219750a6b2b8fb20a81c1afc0a 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@ from setuptools import setup, find_packages
 import shutil
 import tempfile
 
-requires = ["paddlepaddle == 1.7.2", "pyyaml >= 5.1.1"]
+requires = ["paddlepaddle == 1.7.2", "PyYAML >= 5.1.1"]
 
 about = {}
 about["__title__"] = "paddle-rec"