diff --git a/mindspore/ccsrc/transform/express_ir/mindir_exporter.cc b/mindspore/ccsrc/transform/express_ir/mindir_exporter.cc
index cb487a5fe6..0a0b220093 100644
--- a/mindspore/ccsrc/transform/express_ir/mindir_exporter.cc
+++ b/mindspore/ccsrc/transform/express_ir/mindir_exporter.cc
@@ -192,7 +192,6 @@ void IrExportBuilder::BuildParameters(const FuncGraphPtr &func_graph, mind_ir::G
       mind_ir::TensorProto *parameter_proto = graph_proto->add_parameter();
       parameter_proto->set_name(param_name);
       SetParamToTensorProto(param, parameter_proto);
-      auto tensor = std::dynamic_pointer_cast<tensor::Tensor>(param->default_param());
     } else {
       mind_ir::ValueInfoProto *input_proto = graph_proto->add_input();
       input_proto->set_name(param_name);
diff --git a/mindspore/train/dataset_helper.py b/mindspore/train/dataset_helper.py
index 01f1ff1c3c..534ae2176e 100644
--- a/mindspore/train/dataset_helper.py
+++ b/mindspore/train/dataset_helper.py
@@ -183,7 +183,7 @@ class DatasetHelper:
         >>> train_dataset = create_custom_dataset()
         >>> set_helper = DatasetHelper(train_dataset, dataset_sink_mode=False)
         >>> for next_element in set_helper:
-        >>>     print(next_element)
+        ...     print(next_element)
     """
 
     def __init__(self, dataset, dataset_sink_mode=True, sink_size=-1, epoch_num=1):
diff --git a/mindspore/train/serialization.py b/mindspore/train/serialization.py
index 52b59ed2fc..45936ca51c 100644
--- a/mindspore/train/serialization.py
+++ b/mindspore/train/serialization.py
@@ -889,7 +889,6 @@ def _merge_param_with_strategy(sliced_data, parameter_name, strategy, is_even):
         raise ValueError(f"The sliced_parameters length should be equal to device_count. "
                          f"the sliced_parameters length is {len(sliced_data)} but device_count is {device_count}.")
 
-    merged_tensor = None
     if not param_split_shape:
         if not is_even:
             raise ValueError("The shape of every parameter in sliced_parameters should be the same "
@@ -1052,7 +1051,6 @@ def merge_sliced_parameter(sliced_parameters, strategy=None):
     layerwise_parallel = sliced_parameters[0].layerwise_parallel
     requires_grad = sliced_parameters[0].requires_grad
     sliced_data = [parameter.data.asnumpy() for parameter in sliced_parameters]
-    merged_parameter = None
 
     if not strategy:
         merged_tensor = Tensor(np.concatenate(sliced_data))
@@ -1121,7 +1119,7 @@ def load_distributed_checkpoint(network, checkpoint_filenames, predict_strategy=
         param_rank = rank_list[param.name][0]
         skip_merge_split = rank_list[param.name][1]
         for rank in param_rank:
-            sliced_param = _load_single_param(checkpoint_filenames[rank], param.name)
+            sliced_param = load_checkpoint(checkpoint_filenames[rank])[param.name]
             sliced_params.append(sliced_param)
         if skip_merge_split:
             split_param = sliced_params[0]
@@ -1213,59 +1211,3 @@ def _merge_and_split(sliced_params, train_strategy, predict_strategy):
     layerwise_parallel = merged_param.layerwise_parallel
     split_param = Parameter(split_tensor, param_name, requires_grad, layerwise_parallel)
     return split_param
-
-
-def _load_single_param(ckpt_file_name, param_name):
-    """Load a parameter from checkpoint."""
-    checkpoint_list = Checkpoint()
-
-    try:
-        with open(ckpt_file_name, "rb") as f:
-            pb_content = f.read()
-        checkpoint_list.ParseFromString(pb_content)
-    except BaseException as e:
-        logger.error("Failed to read the checkpoint file `%s` during load single parameter,"
-                     " please check the correct of the file.", ckpt_file_name)
-        raise ValueError(e.__str__())
-
-    parameter = None
-    try:
-        param_data_list = []
-        for element_id, element in enumerate(checkpoint_list.value):
-            if element.tag != param_name:
-                continue
-            data = element.tensor.tensor_content
-            data_type = element.tensor.tensor_type
-            np_type = tensor_to_np_type[data_type]
-            ms_type = tensor_to_ms_type[data_type]
-            element_data = np.frombuffer(data, np_type)
-            param_data_list.append(element_data)
-            if (element_id == len(checkpoint_list.value) - 1) or \
-                    (element.tag != checkpoint_list.value[element_id + 1].tag):
-                param_data = np.concatenate((param_data_list), axis=0)
-                param_data_list.clear()
-                dims = element.tensor.dims
-                if dims == [0]:
-                    if 'Float' in data_type:
-                        param_data = float(param_data[0])
-                    elif 'Int' in data_type:
-                        param_data = int(param_data[0])
-                    parameter = Parameter(Tensor(param_data, ms_type), name=element.tag)
-                elif dims == [1]:
-                    parameter = Parameter(Tensor(param_data, ms_type), name=element.tag)
-                else:
-                    param_dim = []
-                    for dim in dims:
-                        param_dim.append(dim)
-                    param_value = param_data.reshape(param_dim)
-                    parameter = Parameter(Tensor(param_value, ms_type), name=element.tag)
-                break
-
-    except BaseException as e:
-        logger.error("Failed to load the checkpoint file `%s`.", ckpt_file_name)
-        raise RuntimeError(e.__str__())
-
-    if parameter is None:
-        raise ValueError(f"There is no parameter named {param_name} in this checkpoint file {ckpt_file_name}, "
-                         f"please check parameter name or checkpoint file.")
-    return parameter