diff --git a/ppdet/engine/trainer.py b/ppdet/engine/trainer.py
index f72805f083a5c65bd99c68e0cea5dd1de2bc13a1..272cb32bdb59082abce638d7fb5ac96abc449fa0 100644
--- a/ppdet/engine/trainer.py
+++ b/ppdet/engine/trainer.py
@@ -399,7 +399,8 @@ class Trainer(object):
     def load_weights_sde(self, det_weights, reid_weights):
         if self.model.detector:
             load_weight(self.model.detector, det_weights)
-            load_weight(self.model.reid, reid_weights)
+            if self.model.reid:
+                load_weight(self.model.reid, reid_weights)
         else:
             load_weight(self.model.reid, reid_weights)