diff --git a/mace/python/tools/converter_tool/base_converter.py b/mace/python/tools/converter_tool/base_converter.py
index aeb626a681a579a120008c81082bed0e505f582e..a2158081c1575465712f928f6281525521c0ff62 100644
--- a/mace/python/tools/converter_tool/base_converter.py
+++ b/mace/python/tools/converter_tool/base_converter.py
@@ -256,6 +256,7 @@ class TransformerRule(Enum):
     TRANSPOSE_MATMUL_WEIGHT = 34
     FOLD_EMBEDDING_LOOKUP = 35
     TRANSPOSE_CAFFE_RESHAPE_AND_FLATTEN = 36
+    FOLD_FC_RESHAPE = 37
 
 
 class ConverterInterface(object):
@@ -461,6 +462,7 @@ class ConverterOption(object):
                 TransformerRule.FOLD_SQRDIFF_MEAN,
                 TransformerRule.TRANSFORM_GLOBAL_CONV_TO_FC,
                 TransformerRule.RESHAPE_FC_WEIGHT,
+                TransformerRule.FOLD_FC_RESHAPE,
                 # Model data format related transformation
                 TransformerRule.TRANSPOSE_FILTERS,
                 TransformerRule.TRANSPOSE_DATA_FORMAT,
diff --git a/mace/python/tools/converter_tool/transformer.py b/mace/python/tools/converter_tool/transformer.py
index 5e564fa41a36529294c39837d41acf0a0ef3e653..1fb61f715f05ea406294afc6fa53cde831869a43 100644
--- a/mace/python/tools/converter_tool/transformer.py
+++ b/mace/python/tools/converter_tool/transformer.py
@@ -75,6 +75,8 @@ class Transformer(base_converter.ConverterInterface):
             TransformerRule.TRANSPOSE_FILTERS: self.transpose_filters,
             TransformerRule.TRANSPOSE_MATMUL_WEIGHT:
                 self.transpose_matmul_weight,
+            TransformerRule.FOLD_FC_RESHAPE:
+                self.fold_fc_reshape,
             TransformerRule.TRANSPOSE_DATA_FORMAT: self.transpose_data_format,
             TransformerRule.ADD_WINOGRAD_ARG: self.add_winograd_arg,
             TransformerRule.ADD_IN_OUT_TENSOR_INFO:
@@ -1227,11 +1229,24 @@ class Transformer(base_converter.ConverterInterface):
                     return True
         return False
 
+    def is_after_fc(self, op):
+        while op.input[0] in self._producer:
+            producer = self._producer[op.input[0]]
+            if producer.type in [MaceOp.Activation.name, MaceOp.BiasAdd.name]:
+                op = producer
+                continue
+            elif producer.type == MaceOp.FullyConnected.name:
+                return True
+            else:
+                return False
+        return False
+
     def transform_matmul_to_fc(self):
         net = self._model
         filter_format = self.filter_format()
         for op in net.op:
-            # transform input(4D) -> reshape(2D) -> matmul to fc
+            # transform `input(4D) -> reshape(2D) -> matmul` to `fc(2D)`
+            # fc output is 2D in transformer, using as 4D in op kernel
             # work for TensorFlow
             if op.type == MaceOp.Reshape.name and \
                     len(op.input) == 2 and \
@@ -1268,6 +1283,21 @@ class Transformer(base_converter.ConverterInterface):
                                 [weight_data.shape[1]]
                         return True
 
+            # transform `fc1(2D) -> matmul` to `fc1(2D) -> fc1(2D)`
+            if op.type == MaceOp.MatMul.name and \
+                    filter_format == FilterFormat.HWIO:
+                producer = self._producer[op.input[0]]
+                weight = self._consts[op.input[1]]
+                if len(weight.dims) == 2 and self.is_after_fc(op) and \
+                        len(producer.output_shape[0].dims) == 2 and \
+                        weight.dims[0] == producer.output_shape[0].dims[1]:
+                    six.print_('convert matmul to fc')
+                    op.type = MaceOp.FullyConnected.name
+                    weight_data = np.array(weight.float_data).reshape(
+                        weight.dims)
+                    weight.dims[:] = [1, 1] + list(weight_data.shape)
+                    return True
+
         return False
 
     def update_float_op_data_type(self):
@@ -1750,3 +1780,22 @@ class Transformer(base_converter.ConverterInterface):
                     shape_tensor.data_type = mace_pb2.DT_INT32
                     shape_tensor.int32_data.extend(dims)
                     op.input.append(shape_tensor.name)
+
+    def fold_fc_reshape(self):
+        net = self._model
+        for op in net.op:
+            # whether to reshape fc output(default 4D)
+            if op.type == MaceOp.FullyConnected.name:
+                consumers = self._consumers[op.output[0]]
+                op_output_shape = op.output_shape[0].dims[:]
+                for consumer in consumers:
+                    if consumer.type == MaceOp.Reshape.name and \
+                            consumer.input[1] in self._consts and \
+                            self._consts[consumer.input[1]].int32_data[:] == \
+                            [op_output_shape[0], 1, 1, op_output_shape[1]]:
+                        # work for tensorflow
+                        net.tensors.remove(self._consts[consumer.input[1]])
+                        del consumer.input[1]
+                        self.safe_remove_node(consumer, None)
+                        return True
+        return False
diff --git a/tools/converter.py b/tools/converter.py
index 4af30403ad82550d86ec7b2d81c2129b732cdc2c..486014ab315a9854739701ee3ed0d939133cfe03 100644
--- a/tools/converter.py
+++ b/tools/converter.py
@@ -411,7 +411,7 @@ def format_model_config(flags):
                                ModuleName.YAML_CONFIG,
                                "'input_data_formats' must be in "
                                + str(DataFormatStrs) + ", but got "
-                               + input_data_formats)
+                               + input_data_format)
             else:
                 subgraph[YAMLKeyword.input_data_formats] = [DataFormat.NHWC]
 
@@ -431,7 +431,7 @@ def format_model_config(flags):
                         subgraph[YAMLKeyword.output_data_formats]:
                     mace_check(output_data_format in DataFormatStrs,
                                ModuleName.YAML_CONFIG,
-                               "'input_data_formats' must be in "
+                               "'output_data_formats' must be in "
                                + str(DataFormatStrs))
             else:
                 subgraph[YAMLKeyword.output_data_formats] = [DataFormat.NHWC]