diff --git a/comfy/cli_args.py b/comfy/cli_args.py
index de3e85c08..993173a53 100644
--- a/comfy/cli_args.py
+++ b/comfy/cli_args.py
@@ -50,6 +50,7 @@ parser.add_argument("--input-directory", type=str, default=None, help="Set the C
 parser.add_argument("--auto-launch", action="store_true", help="Automatically launch ComfyUI in the default browser.")
 parser.add_argument("--disable-auto-launch", action="store_true", help="Disable auto launching the browser.")
 parser.add_argument("--cuda-device", type=int, default=None, metavar="DEVICE_ID", help="Set the id of the cuda device this instance will use. All other devices will not be visible.")
+parser.add_argument("--ascend-device", type=int, default=None, metavar="ASCEND_DEVICE_ID", help="Set the id of the ascend device this instance will use. All other devices will not be visible.")
 parser.add_argument("--default-device", type=int, default=None, metavar="DEFAULT_DEVICE_ID", help="Set the id of the default device, all other devices will stay visible.")
 cm_group = parser.add_mutually_exclusive_group()
 cm_group.add_argument("--cuda-malloc", action="store_true", help="Enable cudaMallocAsync (enabled by default for torch 2.0 and up).")
diff --git a/main.py b/main.py
index c33f0e17b..0ab33d603 100644
--- a/main.py
+++ b/main.py
@@ -128,6 +128,9 @@ if __name__ == "__main__":
         os.environ['CUDA_VISIBLE_DEVICES'] = str(args.cuda_device)
         os.environ['HIP_VISIBLE_DEVICES'] = str(args.cuda_device)
         logging.info("Set cuda device to: {}".format(args.cuda_device))
+    elif args.ascend_device is not None:
+        os.environ["ASCEND_RT_VISIBLE_DEVICES"] = str(args.ascend_device)
+        logging.info("Set npu device to: {}".format(args.ascend_device))
 
     if args.oneapi_device_selector is not None:
         os.environ['ONEAPI_DEVICE_SELECTOR'] = args.oneapi_device_selector