yjstone

这样就可以了：

    setlocal ENABLEDELAYEDEXPANSION
   for /f  "delims=" %%i in ( c:\bat3.txt ) do (
    set var=%%i
   set var=!var:Timing, TOTAL TIME ^(CREATE CUBE^)=Timing!
    echo !var! >> c:\newbat3.txt
    )
   PAUSE
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yjstone

还可以更简洁一些：

 for /f  "delims=" %%i in ( c:\bat3.txt ) do (
   set var=%%i
   call echo %%var:Timing, TOTAL TIME ^(CREATE CUBE^)=Timing%%>>c:\newbat3.txt
   )
   PAUSE
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