diff --git a/configs/det/ch_ppocr_v1.1/ch_det_mv3_db.yml b/configs/det/ch_ppocr_v1.1/ch_det_mv3_db_v2.0.yml
similarity index 100%
rename from configs/det/ch_ppocr_v1.1/ch_det_mv3_db.yml
rename to configs/det/ch_ppocr_v1.1/ch_det_mv3_db_v2.0.yml
diff --git a/configs/det/ch_ppocr_v1.1/ch_det_res18_db.yml b/configs/det/ch_ppocr_v1.1/ch_det_res18_db_v2.0.yml
similarity index 100%
rename from configs/det/ch_ppocr_v1.1/ch_det_res18_db.yml
rename to configs/det/ch_ppocr_v1.1/ch_det_res18_db_v2.0.yml
diff --git a/ppocr/data/simple_dataset.py b/ppocr/data/simple_dataset.py
index 168913265b069c74ce23774699ff38f0d29a8589..d2069d0d5fb608650bbaa2002a27a59265e334c5 100644
--- a/ppocr/data/simple_dataset.py
+++ b/ppocr/data/simple_dataset.py
@@ -57,9 +57,9 @@ class SimpleDataSet(Dataset):
         sample_num = round(len(datas) * sample_ratio)
 
         if data_num_per_epoch is not None:
-            sample_num = data_num_per_epoch * sample_ratio
+            sample_num = int(data_num_per_epoch * sample_ratio)
 
-        nums, rem = sample_num // len(datas), sample_num % len(datas)
+        nums, rem = int(sample_num // len(datas)), int(sample_num % len(datas))
         return list(datas) * nums + random.sample(datas, rem)
 
     def get_image_info_list(self,