diff --git a/dygraph/utils/utils.py b/dygraph/utils/utils.py
index 41920d2a647143fe81c93f5243d011d3ca3ec765..a16f82276f3b9274a4e8854fef1a2597ad98f3bd 100644
--- a/dygraph/utils/utils.py
+++ b/dygraph/utils/utils.py
@@ -29,15 +29,7 @@ def seconds_to_hms(seconds):
     return hms_str
 
 
-def setting_environ_flags():
-    if "CUDA_VISIBLE_DEVICES" in os.environ:
-        if os.environ["CUDA_VISIBLE_DEVICES"].count("-1") > 0:
-            os.environ["CUDA_VISIBLE_DEVICES"] = ""
-
-
 def get_environ_info():
-    setting_environ_flags()
-    import paddle.fluid as fluid
     info = dict()
     info['place'] = 'cpu'
     info['num'] = int(os.environ.get('CPU_NUM', 1))