diff --git a/test.py b/test.py
index 3343b6b..d623f4b 100644
--- a/test.py
+++ b/test.py
@@ -7,9 +7,6 @@ import torch
 from utils.tool import *
 from module.detector import Detector
 
-# 指定后端设备CUDA&CPU
-device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
-
 if __name__ == '__main__':
     # 指定训练配置文件
     parser = argparse.ArgumentParser()
@@ -18,12 +15,25 @@ if __name__ == '__main__':
     parser.add_argument('--img', type=str, default='', help='The path of test image')
     parser.add_argument('--thresh', type=float, default=0.8, help='The path of test image')
     parser.add_argument('--onnx', action="store_true", default=False, help='Export onnx file')
+    parser.add_argument('--cpu', action="store_true", default=False, help='Run on cpu')
 
     opt = parser.parse_args()
     assert os.path.exists(opt.yaml), "请指定正确的配置文件路径"
     assert os.path.exists(opt.weight), "请指定正确的模型路径"
     assert os.path.exists(opt.img), "请指定正确的测试图像路径"
 
+    # 选择推理后端
+    if opt.cpu:
+        print("run on cpu...")
+        device = torch.device("cpu")
+    else:
+        if torch.cuda.is_available():
+            print("run on gpu...")
+            device = torch.device("cuda")
+        else:
+            print("run on cpu...")
+            device = torch.device("cpu")     
+
     # 解析yaml配置文件
     cfg = LoadYaml(opt.yaml)    
     print(cfg) 
@@ -85,4 +95,4 @@ if __name__ == '__main__':
         cv2.putText(ori_img, '%.2f' % obj_score, (x1, y1 - 5), 0, 0.7, (0, 255, 0), 2)	
         cv2.putText(ori_img, category, (x1, y1 - 25), 0, 0.7, (0, 255, 0), 2)
 
-    cv2.imwrite("result.png", ori_img)
\ No newline at end of file
+    cv2.imwrite("result.png", ori_img)