diff --git a/example/resnet50_imagenet2012_THOR/model/dataset_helper.py b/example/resnet50_imagenet2012_THOR/model/dataset_helper.py
index 474bccf42f4..77f67344c2b 100644
--- a/example/resnet50_imagenet2012_THOR/model/dataset_helper.py
+++ b/example/resnet50_imagenet2012_THOR/model/dataset_helper.py
@@ -15,6 +15,7 @@
 """Dataset help for minddata dataset"""
 from mindspore._checkparam import check_bool
 from mindspore.parallel._utils import _get_device_num, _get_parallel_mode
+from mindspore.train.dataset_helper import _send_data
 from mindspore.train._utils import _exec_datagraph, _get_types_and_shapes, \
     _to_full_shapes
 from mindspore.train.parallel_utils import ParallelMode
@@ -67,7 +68,13 @@ class _DatasetIter:
                 self.loop_size = dataset.get_dataset_size()
             else:
                 self.loop_size = dataset.__loop_size__
-            dataset.__ME_INITED__ = _exec_datagraph(dataset, self.loop_size).queue_name
+            dataset.__TRANSFER_DATASET__ = _exec_datagraph(dataset, self.loop_size)
+            dataset.__ME_INITED__ = dataset.__TRANSFER_DATASET__.queue_name
+
+            if not hasattr(dataset, '__no_send__'):
+                _send_data(dataset)
+        else:
+            _send_data(dataset)
 
         self.ind = 0
         self.dataset = dataset
diff --git a/mindspore/train/_utils.py b/mindspore/train/_utils.py
index 7bc07b126ef..3072771b294 100644
--- a/mindspore/train/_utils.py
+++ b/mindspore/train/_utils.py
@@ -16,11 +16,10 @@
 import os
 import numpy as np
 from mindspore.common.tensor import Tensor
-from mindspore.common.dtype import dtype_to_nptype
+from mindspore.common.dtype import dtype_to_nptype, pytype_to_dtype
 from mindspore.common import dtype as mstype
 from mindspore import log as logger
 from mindspore.common.api import _executor
-from mindspore.common.dtype import pytype_to_dtype
 
 
 def _convert_type(types):
@@ -63,9 +62,6 @@ def _exec_datagraph(exec_dataset, dataset_size, phase='dataset'):
                            dataset_shapes,
                            input_indexs,
                            phase=phase)
-
-    # engine dataset to write data to tdt queue
-    exec_dataset.send()
     return exec_dataset
 
 
diff --git a/mindspore/train/dataset_helper.py b/mindspore/train/dataset_helper.py
index 083349e5a1c..28d65349ee7 100644
--- a/mindspore/train/dataset_helper.py
+++ b/mindspore/train/dataset_helper.py
@@ -24,6 +24,14 @@ from ..nn.wrap import GetNextSingleOp
 from ..parallel._utils import _get_device_num, _get_global_rank, _get_parallel_mode
 
 
+def _send_data(dataset):
+    """Engine dataset to write data to tdt queue."""
+    if not hasattr(dataset, '__has_sent__'):
+        exec_dataset = dataset.__TRANSFER_DATASET__
+        exec_dataset.send()
+        dataset.__has_sent__ = True
+
+
 class DatasetHelper:
     """
     Help function to use the Minddata dataset.
@@ -82,7 +90,13 @@ class _DatasetIter:
                 self.loop_size = dataset.get_dataset_size()
             else:
                 self.loop_size = dataset.__loop_size__
-            dataset.__ME_INITED__ = _exec_datagraph(dataset, self.loop_size).queue_name
+            dataset.__TRANSFER_DATASET__ = _exec_datagraph(dataset, self.loop_size)
+            dataset.__ME_INITED__ = dataset.__TRANSFER_DATASET__.queue_name
+
+            if not hasattr(dataset, '__no_send__'):
+                _send_data(dataset)
+        else:
+            _send_data(dataset)
 
         self.ind = 0
         self.dataset = dataset
diff --git a/mindspore/train/model.py b/mindspore/train/model.py
index 427e5a29ce7..27d448b8e79 100755
--- a/mindspore/train/model.py
+++ b/mindspore/train/model.py
@@ -278,7 +278,7 @@ class Model:
 
             if self._parameter_broadcast:
                 self._train_network.set_broadcast_flag()
-
+            train_dataset.__no_send__ = True
             train_dataset_helper, train_network = self._exec_preprocess(self._train_network,
                                                                         is_train=True,
                                                                         phase='train',
@@ -295,6 +295,7 @@ class Model:
 
             self._eval_network.set_train(False)
             self._eval_network.phase = 'eval'
+            valid_dataset.__no_send__ = True
             valid_dataset_helper, eval_network = self._exec_preprocess(self._eval_network,
                                                                        is_train=False,
                                                                        phase='eval',