@echo off
rem 演示：删除指定路径下指定天数以前的文件夹，文件夹命名方式形如2008-10-5
rem 如果演示结果无误，把rd前面的echo去掉，即可实现真正删除
setlocal enabledelayedexpansion
rem 指定待删除文件夹的存放路径
set SrcDir=C:\Test
rem 指定天数
set DayAgo=15
>"%temp%\MyDate.vbs" echo LastDate=date()-%DayAgo%
>>"%temp%\MyDate.vbs" echo FmtDate=year(LastDate) ^& month(LastDate) ^& day(LastDate)
>>"%temp%\MyDate.vbs" echo wscript.echo FmtDate
for /f %%a in ('cscript /nologo "%temp%\MyDate.vbs"') do (
  set DateFlag=%%a
)
for /f %%a in ('dir /b /ad "%SrcDir%"') do (
  set FldDate=%%a
  set FldDate=!FldDate:-=!
  if !FldDate! leq %DateFlag% (
    echo rd /s /q "%SrcDir%\%%a"
  )
)
pause
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