diff --git a/deploy/python/README.md b/deploy/python/README.md
index 43622a363fc79d9248b5f452bf35eaf05eb2263c..3f4cd5832f6142909ee755a3a7edd3767ef79fcd 100644
--- a/deploy/python/README.md
+++ b/deploy/python/README.md
@@ -39,7 +39,7 @@ python deploy/python/infer.py --model_dir=./inference/yolov3_mobilenet_v1_roadsi
 | --threshold | No|预测得分的阈值，默认为0.5|
 | --output_dir | No|可视化结果保存的根目录，默认为output/|
 | --run_benchmark | No| 是否运行benchmark，同时需指定`--image_file`或`--image_dir` |
-| --use_mkldnn | No | CPU预测中是否开启MKLDNN加速 |
+| --enable_mkldnn | No | CPU预测中是否开启MKLDNN加速 |
 | --cpu_threads | No| 设置cpu线程数，默认为1 |
 
 说明：
diff --git a/ppdet/engine/export_utils.py b/ppdet/engine/export_utils.py
index 0bff32cdbd927e3c65c3acdd35f491b122b7b34a..04506dc9d0bee9eebf356984ec7692d26ec4b32a 100644
--- a/ppdet/engine/export_utils.py
+++ b/ppdet/engine/export_utils.py
@@ -31,7 +31,7 @@ TRT_MIN_SUBGRAPH = {
     'SSD': 60,
     'RCNN': 40,
     'RetinaNet': 40,
-    'S2ANet': 40,
+    'S2ANet': 80,
     'EfficientDet': 40,
     'Face': 3,
     'TTFNet': 60,