尝试一下:

@echo off & setlocal 
set "InFile=Z:\Text.txt" 
set "OutFile=Z:\Erg.txt" 
set /p LineToDelete=

if exist "%OutFile%" del "%OutFile%" 
for /f "tokens=1* delims=:" %%i in ('findstr /n $ "%InFile%"^|findstr /b "%LineToDelete%:"') do findstr /v /b /c:"%%j" "%InFile%">>"%OutFile%"