diff --git a/python/paddle/fluid/dygraph/dygraph_to_static/convert_call_func.py b/python/paddle/fluid/dygraph/dygraph_to_static/convert_call_func.py
index b7d25e2a14b49166e3ea8ad5e6d63f75ef2517a7..7604be2d838eb669c0f1af1f3a4c53716ce2562f 100644
--- a/python/paddle/fluid/dygraph/dygraph_to_static/convert_call_func.py
+++ b/python/paddle/fluid/dygraph/dygraph_to_static/convert_call_func.py
@@ -31,6 +31,7 @@ from paddle.fluid.dygraph.dygraph_to_static.logging_utils import TranslatorLogge
 from paddle.fluid.dygraph.dygraph_to_static.program_translator import StaticFunction
 from paddle.fluid.dygraph.dygraph_to_static.program_translator import convert_to_static
 from paddle.fluid.dygraph.dygraph_to_static.program_translator import unwrap_decorators
+from paddle.fluid.dygraph.dygraph_to_static.utils import is_paddle_func
 from paddle.fluid.dygraph.layers import Layer
 
 __all__ = ["convert_call"]
@@ -74,11 +75,6 @@ def is_builtin_len(func):
     return False
 
 
-def is_paddle_func(func):
-    m = inspect.getmodule(func)
-    return m is not None and m.__name__.startswith("paddle")
-
-
 def is_unsupported(func):
     """
     Checks whether the func is supported by dygraph to static graph.
diff --git a/python/paddle/fluid/dygraph/dygraph_to_static/utils.py b/python/paddle/fluid/dygraph/dygraph_to_static/utils.py
index 3676958f15df501f7e1ba7d1cf6c17cd3d78abbf..9e61b8aa1ee4267712f18ed3a15fe8a5e80fdb77 100644
--- a/python/paddle/fluid/dygraph/dygraph_to_static/utils.py
+++ b/python/paddle/fluid/dygraph/dygraph_to_static/utils.py
@@ -30,6 +30,12 @@ import numpy as np
 from paddle.fluid import unique_name
 from paddle.fluid.data_feeder import convert_dtype
 
+# Note(Aurelius): Do not forget the dot `.` to distinguish other
+# module such as paddlenlp.
+PADDLE_MODULE_PREFIX = 'paddle.'
+DYGRAPH_MODULE_PREFIX = 'paddle.fluid.dygraph'
+DYGRAPH_TO_STATIC_MODULE_PREFIX = 'paddle.fluid.dygraph.dygraph_to_static'
+
 
 class BaseNodeVisitor(gast.NodeVisitor):
     """
@@ -191,16 +197,21 @@ def is_api_in_module(node, module_prefix):
 def is_dygraph_api(node):
 
     # Note: A api in module dygraph_to_static is not a real dygraph api.
-    if is_api_in_module(node, "paddle.fluid.dygraph.dygraph_to_static"):
+    if is_api_in_module(node, DYGRAPH_TO_STATIC_MODULE_PREFIX):
         return False
 
     # TODO(liym27): A better way to determine whether it is a dygraph api.
     #  Consider the decorator @dygraph_only
-    return is_api_in_module(node, "paddle.fluid.dygraph")
+    return is_api_in_module(node, DYGRAPH_MODULE_PREFIX)
 
 
 def is_paddle_api(node):
-    return is_api_in_module(node, "paddle")
+    return is_api_in_module(node, PADDLE_MODULE_PREFIX)
+
+
+def is_paddle_func(func):
+    m = inspect.getmodule(func)
+    return m is not None and m.__name__.startswith(PADDLE_MODULE_PREFIX)
 
 
 # Is numpy_api cannot reuse is_api_in_module because of numpy module problem
@@ -1235,7 +1246,7 @@ def input_specs_compatible(src_input_specs, desired_input_specs):
     len_specs = len(src_input_specs)
     if len_specs != len(desired_input_specs):
         # NOTE(chenweihang): if the input_spec of jit.save is a subset of
-        # input_spec of to_static, also compatible 
+        # input_spec of to_static, also compatible
         for spec in src_input_specs:
             if spec not in desired_input_specs:
                 return False
diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_utils.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_utils.py
index 24b8833fec1925f4a52e7361aeb24818a580cca2..747e9f1c0dbd93be3300b81f34183095d54a6571 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/test_utils.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/test_utils.py
@@ -14,10 +14,12 @@
 
 from __future__ import print_function
 
+import types
 import unittest
 
 from paddle.fluid.dygraph.dygraph_to_static import ProgramTranslator
 from paddle.fluid.dygraph.dygraph_to_static.utils import index_in_list
+from paddle.fluid.dygraph.dygraph_to_static.utils import is_paddle_func
 
 from test_program_translator import get_source_code
 
@@ -61,5 +63,14 @@ class TestSplitAssignTransformer(unittest.TestCase):
         self.assertEqual(answer, code)
 
 
+class TestIsPaddle(unittest.TestCase):
+    def fake_module(self):
+        return types.ModuleType('paddlenlp')
+
+    def test_func(self):
+        m = self.fake_module()
+        self.assertFalse(is_paddle_func(m))
+
+
 if __name__ == '__main__':
     unittest.main()