diff --git a/ppocr/losses/combined_loss.py b/ppocr/losses/combined_loss.py
index eb1ad9bf92b53ada4ba32b4ab238e3f9f3f6ae22..f37c4db128e5b0cb3ef9a9fe249402ba37d5ceeb 100644
--- a/ppocr/losses/combined_loss.py
+++ b/ppocr/losses/combined_loss.py
@@ -17,7 +17,7 @@ import paddle.nn as nn
 
 from .distillation_loss import DistillationCTCLoss
 from .distillation_loss import DistillationDMLLoss
-from .distillation_loss import DistillationDistanceLoss
+from .distillation_loss import DistillationDistanceLoss, DistillationDBLoss, DistillationDilaDBLoss
 
 
 class CombinedLoss(nn.Layer):