diff --git a/bash/delete_than.sh b/bash/delete_than.sh
index a5781eb..c93a0e7 100644
--- a/bash/delete_than.sh
+++ b/bash/delete_than.sh
@@ -5,14 +5,14 @@ folder="/home/pi/mp4"
 # 进入文件夹
 cd $folder
 # 获取文件夹的大小
-size=$(du -sh "$folder" | awk '{print int($1/1024)}')
-while [[ $size -gt 20 ]]
+size=$(du -sh "$folder" | awk '{print int($1)}')
+while [[ $size -gt 50 ]]
 do
   # 获取最早创建的文件
   oldest_file=$(ls $folder -tr | head -1 | xargs)
   rm -f $oldest_file
-  size=$(du -sh "$folder" | awk '{print int($1/1024)}')
-  if [[ $size -le 20 ]]
+  size=$(du -sh "$folder" | awk '{print int($1)}')
+  if [[ $size -le 50 ]]
   then
     exit 0
   fi