diff --git a/python/paddle/fluid/tests/unittests/test_arg_min_max_v2_op.py b/python/paddle/fluid/tests/unittests/test_arg_min_max_v2_op.py
index f5cb975019c98..3b588780944a8 100644
--- a/python/paddle/fluid/tests/unittests/test_arg_min_max_v2_op.py
+++ b/python/paddle/fluid/tests/unittests/test_arg_min_max_v2_op.py
@@ -366,5 +366,17 @@ def test_argmin_dtype_type():
             self.assertRaises(ValueError, test_argmin_dtype_type)
 
 
+class TestArgMaxOpFp16(unittest.TestCase):
+    def test_fp16(self):
+        paddle.enable_static()
+        x_np = np.random.random((10, 16)).astype('float16')
+        x = paddle.static.data(shape=[10, 16], name='x', dtype='float16')
+        out = paddle.argmax(x)
+        exe = paddle.static.Executor()
+        exe.run(paddle.static.default_startup_program())
+        out = exe.run(feed={'x': x_np}, fetch_list=[out])
+        paddle.disable_static()
+
+
 if __name__ == '__main__':
     unittest.main()
diff --git a/python/paddle/tensor/search.py b/python/paddle/tensor/search.py
index e16ac89953fb1..2da63d90afd07 100755
--- a/python/paddle/tensor/search.py
+++ b/python/paddle/tensor/search.py
@@ -185,7 +185,15 @@ def argmax(x, axis=None, keepdim=False, dtype="int64", name=None):
         check_variable_and_dtype(
             x,
             'x',
-            ['float32', 'float64', 'int16', 'int32', 'int64', 'uint8'],
+            [
+                'float16',
+                'float32',
+                'float64',
+                'int16',
+                'int32',
+                'int64',
+                'uint8',
+            ],
             'paddle.argmax',
         )
         check_dtype(var_dtype, 'dtype', ['int32', 'int64'], 'argmin')