diff --git a/train_sft_ds.py b/train_sft_ds.py
index 76bf3fc..2f87781 100644
--- a/train_sft_ds.py
+++ b/train_sft_ds.py
@@ -315,6 +315,7 @@ def parse_args():
     ap.add_argument("--local_rank", type=int, default=-1,
                     help="for deepspeed/torchrun launcher; ignored by user code")
     ap.add_argument("--per_device_eval_batch_size", type=int, default=1)
+    ap.add_argument("--deepspeed", type=str, default=None)
     return ap.parse_args()
 
 
@@ -590,7 +591,7 @@ def main():
         logging_steps=args.log_interval,
         save_steps=args.save_steps,
         save_total_limit=2,
-        deepspeed=args.deepspeed,
+        deepspeed=(args.deepspeed if args.deepspeed and os.path.isfile(args.deepspeed) else None),
         dataloader_drop_last=False,          # 关键：别丢尾，避免空 batch
         dataloader_num_workers=0,
         dataloader_prefetch_factor=None,