diff --git a/funasr/bin/build_trainer.py b/funasr/bin/build_trainer.py
index 6bd5bd715..5c30fdb6f 100644
--- a/funasr/bin/build_trainer.py
+++ b/funasr/bin/build_trainer.py
@@ -132,8 +132,7 @@ def build_trainer(modelscope_dict,
         if args.dataset_type == "small":
             args.batch_bins = batch_bins
         elif args.dataset_type == "large":
-            if "batch_size" not in args.dataset_conf["batch_conf"]:
-                args.dataset_conf["batch_conf"]["batch_size"] = batch_bins
+            args.dataset_conf["batch_conf"]["batch_size"] = batch_bins
         else:
             raise ValueError(f"Not supported dataset_type={args.dataset_type}")
     if args.normalize in ["null", "none", "None"]: