diff --git a/tools/infer/utility.py b/tools/infer/utility.py
index f4e62b87a506ccff889df398d363411a919b5ed5..8ad916bee8ec6872a78448446447b6b7f6086a56 100755
--- a/tools/infer/utility.py
+++ b/tools/infer/utility.py
@@ -139,9 +139,83 @@ def create_predictor(args, mode, logger):
         config.enable_use_gpu(args.gpu_mem, 0)
         if args.use_tensorrt:
             config.enable_tensorrt_engine(
-                precision_mode=inference.PrecisionType.Half
-                if args.use_fp16 else inference.PrecisionType.Float32,
-                max_batch_size=args.max_batch_size)
+                precision_mode=inference.PrecisionType.Float32,
+                max_batch_size=args.max_batch_size,
+                min_subgraph_size=3)  # skip the minmum trt subgraph 
+        if mode == "det" and "mobile" in model_file_path:
+            min_input_shape = {
+                "x": [1, 3, 50, 50],
+                "conv2d_92.tmp_0": [1, 96, 20, 20],
+                "conv2d_91.tmp_0": [1, 96, 10, 10],
+                "nearest_interp_v2_1.tmp_0": [1, 96, 10, 10],
+                "nearest_interp_v2_2.tmp_0": [1, 96, 20, 20],
+                "nearest_interp_v2_3.tmp_0": [1, 24, 20, 20],
+                "nearest_interp_v2_4.tmp_0": [1, 24, 20, 20],
+                "nearest_interp_v2_5.tmp_0": [1, 24, 20, 20],
+                "elementwise_add_7": [1, 56, 2, 2],
+                "nearest_interp_v2_0.tmp_0": [1, 96, 2, 2]
+            }
+            max_input_shape = {
+                "x": [1, 3, 2000, 2000],
+                "conv2d_92.tmp_0": [1, 96, 400, 400],
+                "conv2d_91.tmp_0": [1, 96, 200, 200],
+                "nearest_interp_v2_1.tmp_0": [1, 96, 200, 200],
+                "nearest_interp_v2_2.tmp_0": [1, 96, 400, 400],
+                "nearest_interp_v2_3.tmp_0": [1, 24, 400, 400],
+                "nearest_interp_v2_4.tmp_0": [1, 24, 400, 400],
+                "nearest_interp_v2_5.tmp_0": [1, 24, 400, 400],
+                "elementwise_add_7": [1, 56, 400, 400],
+                "nearest_interp_v2_0.tmp_0": [1, 96, 400, 400]
+            }
+            opt_input_shape = {
+                "x": [1, 3, 640, 640],
+                "conv2d_92.tmp_0": [1, 96, 160, 160],
+                "conv2d_91.tmp_0": [1, 96, 80, 80],
+                "nearest_interp_v2_1.tmp_0": [1, 96, 80, 80],
+                "nearest_interp_v2_2.tmp_0": [1, 96, 160, 160],
+                "nearest_interp_v2_3.tmp_0": [1, 24, 160, 160],
+                "nearest_interp_v2_4.tmp_0": [1, 24, 160, 160],
+                "nearest_interp_v2_5.tmp_0": [1, 24, 160, 160],
+                "elementwise_add_7": [1, 56, 40, 40],
+                "nearest_interp_v2_0.tmp_0": [1, 96, 40, 40]
+            }
+        if mode == "det" and "server" in model_file_path:
+            min_input_shape = {
+                "x": [1, 3, 50, 50],
+                "conv2d_59.tmp_0": [1, 96, 20, 20],
+                "nearest_interp_v2_2.tmp_0": [1, 96, 20, 20],
+                "nearest_interp_v2_3.tmp_0": [1, 24, 20, 20],
+                "nearest_interp_v2_4.tmp_0": [1, 24, 20, 20],
+                "nearest_interp_v2_5.tmp_0": [1, 24, 20, 20]
+            }
+            max_input_shape = {
+                "x": [1, 3, 2000, 2000],
+                "conv2d_59.tmp_0": [1, 96, 400, 400],
+                "nearest_interp_v2_2.tmp_0": [1, 96, 400, 400],
+                "nearest_interp_v2_3.tmp_0": [1, 24, 400, 400],
+                "nearest_interp_v2_4.tmp_0": [1, 24, 400, 400],
+                "nearest_interp_v2_5.tmp_0": [1, 24, 400, 400]
+            }
+            opt_input_shape = {
+                "x": [1, 3, 640, 640],
+                "conv2d_59.tmp_0": [1, 96, 160, 160],
+                "nearest_interp_v2_2.tmp_0": [1, 96, 160, 160],
+                "nearest_interp_v2_3.tmp_0": [1, 24, 160, 160],
+                "nearest_interp_v2_4.tmp_0": [1, 24, 160, 160],
+                "nearest_interp_v2_5.tmp_0": [1, 24, 160, 160]
+            }
+        elif mode == "rec":
+            min_input_shape = {"x": [args.rec_batch_num, 3, 32, 10]}
+            max_input_shape = {"x": [args.rec_batch_num, 3, 32, 2000]}
+            opt_input_shape = {"x": [args.rec_batch_num, 3, 32, 320]}
+        elif mode == "cls":
+            min_input_shape = {"x": [args.rec_batch_num, 3, 48, 10]}
+            max_input_shape = {"x": [args.rec_batch_num, 3, 48, 2000]}
+            opt_input_shape = {"x": [args.rec_batch_num, 3, 48, 320]}
+
+        config.set_trt_dynamic_shape_info(min_input_shape, max_input_shape,
+                                          opt_input_shape)
+
     else:
         config.disable_gpu()
         if hasattr(args, "cpu_threads"):