diff --git a/internlm/solver/optimizer/hybrid_zero_optim.py b/internlm/solver/optimizer/hybrid_zero_optim.py
index 2817258..aa058c7 100644
--- a/internlm/solver/optimizer/hybrid_zero_optim.py
+++ b/internlm/solver/optimizer/hybrid_zero_optim.py
@@ -809,6 +809,8 @@ class HybridZeroOptimizer(BaseOptimizer):
         for handle in handles:
             handle.wait()
 
+        torch.cuda().synchronize()
+
     ##################
     # FP16 Utilities #
     ##################