diff --git a/mindspore/nn/metrics/__init__.py b/mindspore/nn/metrics/__init__.py
index 06429e200e8877d11ab7558fb339121603c1cfea..b82673b2ba73c1185f5f26469a582e5666d004fb 100755
--- a/mindspore/nn/metrics/__init__.py
+++ b/mindspore/nn/metrics/__init__.py
@@ -20,7 +20,6 @@ on the evaluation dataset. It's used to choose the best model.
 """
 from .accuracy import Accuracy
 from .error import MAE, MSE
-from .evaluation import EvaluationBase
 from .metric import Metric
 from .precision import Precision
 from .recall import Recall
@@ -32,7 +31,6 @@ __all__ = [
     "names", "get_metric_fn",
     "Accuracy",
     "MAE", "MSE",
-    "EvaluationBase",
     "Metric",
     "Precision",
     "Recall",
diff --git a/mindspore/nn/metrics/evaluation.py b/mindspore/nn/metrics/_evaluation.py
similarity index 100%
rename from mindspore/nn/metrics/evaluation.py
rename to mindspore/nn/metrics/_evaluation.py
diff --git a/mindspore/nn/metrics/accuracy.py b/mindspore/nn/metrics/accuracy.py
index f131432ddd2b675303f28fbbbe6655321ce97a0e..9537b4b95c926091fd76fbd331764cb51df6c257 100644
--- a/mindspore/nn/metrics/accuracy.py
+++ b/mindspore/nn/metrics/accuracy.py
@@ -14,7 +14,7 @@
 # ============================================================================
 """Accuracy."""
 import numpy as np
-from .evaluation import EvaluationBase
+from ._evaluation import EvaluationBase
 
 
 class Accuracy(EvaluationBase):
diff --git a/mindspore/nn/metrics/precision.py b/mindspore/nn/metrics/precision.py
index 633b9f8e2cdfd67df2d2604347376cdfd373f55b..c0a3f9c12e33fd2192adde4ea5f09f07d6c961fe 100644
--- a/mindspore/nn/metrics/precision.py
+++ b/mindspore/nn/metrics/precision.py
@@ -18,7 +18,7 @@ import sys
 import numpy as np
 
 from mindspore._checkparam import Validator as validator
-from .evaluation import EvaluationBase
+from ._evaluation import EvaluationBase
 
 
 class Precision(EvaluationBase):
diff --git a/mindspore/nn/metrics/recall.py b/mindspore/nn/metrics/recall.py
index da06321aa35b6c20f7a7ce15c98fa79e2fbb8ad3..e0bd7538a3dc44d8224383f0020f5977ae275a68 100644
--- a/mindspore/nn/metrics/recall.py
+++ b/mindspore/nn/metrics/recall.py
@@ -18,7 +18,7 @@ import sys
 import numpy as np
 
 from mindspore._checkparam import Validator as validator
-from .evaluation import EvaluationBase
+from ._evaluation import EvaluationBase
 
 
 class Recall(EvaluationBase):