diff --git a/fleetrec/core/factory.py b/fleetrec/core/factory.py
index 11752bcab719666bb785c6f6e8378237198ff532..9a1fa3cf76f33cade87e6f6e91139ab06e558ff7 100644
--- a/fleetrec/core/factory.py
+++ b/fleetrec/core/factory.py
@@ -34,7 +34,7 @@ class TrainerFactory(object):
 
         train_mode = envs.get_global_env("train.strategy.mode")
 
-        if train_mode is not None:
+        if train_mode is None:
             train_mode = envs.get_runtime_envion("train.trainer")
 
         if train_mode == "SingleTraining":