diff --git a/configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_student.yml b/configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_student.yml
index ec03ba22db528e11d334d435ca57863e6f9425bd..60a4700e3f48850011840fe0d202dbb0b91dd46b 100644
--- a/configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_student.yml
+++ b/configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_student.yml
@@ -11,7 +11,7 @@ Global:
   - 1500
   cal_metric_during_train: false
   checkpoints:
-  pretrained_model:
+  pretrained_model: https://paddleocr.bj.bcebos.com/pretrained/PPLCNetV3_x0_75_ocr_det.pdparams
   save_inference_dir: null
   use_visualdl: false
   infer_img: doc/imgs_en/img_10.jpg
@@ -96,8 +96,8 @@ Train:
             - 3
     - EastRandomCropData:
         size:
-        - 640
-        - 640
+        - 960
+        - 960
         max_tries: 50
         keep_ratio: true
     - MakeBorderMap:
diff --git a/configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_teacher.yml b/configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_teacher.yml
index 74581a8bc6259a4b0f21d75fa0dc28a1ac323308..83dd55c6773b01511f7b3f0f99b5503de74c54a6 100644
--- a/configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_teacher.yml
+++ b/configs/det/ch_PP-OCRv4/ch_PP-OCRv4_det_teacher.yml
@@ -11,7 +11,7 @@ Global:
   - 1500
   cal_metric_during_train: false
   checkpoints:
-  pretrained_model:
+  pretrained_model: https://paddleocr.bj.bcebos.com/pretrained/PPHGNet_small_ocr_det.pdparams
   save_inference_dir: null
   use_visualdl: false
   infer_img: doc/imgs_en/img_10.jpg
@@ -96,8 +96,8 @@ Train:
             - 3
     - EastRandomCropData:
         size:
-        - 640
-        - 640
+        - 960
+        - 960
         max_tries: 50
         keep_ratio: true
     - MakeBorderMap: