@echo off&setlocal enabledelayedexpansion 
set m=1 
for /f "delims=" %%i in (s.txt) do ( 
  set /a n+=1 
  if !n! leq 20 echo %%i>>s_!m!.txt 
  if !n! equ 20 set n=0&set /a m+=1 
) 
echo 搞定! 
set dis=1 
:11ss 
for /f %%i in (s_%dis%.txt) do start %%i.bat 
s.exe tcp 192.168.0.1 192.168.0.200 445 10 /save 
set /a dis+=1
if exist s_%dis%.txt goto 11ss
del s_*.txt