echo del d:\database\kup.bak  set /a StartS=%time:~6,2% set /a StartM=%time:~3,2%  set /a StartH=%time:~0,2% >test.txt

输出后看到test.txt显示这样的格式

del d:\database\kup.bak
set /a StartS=%time:~6,2% 
set /a StartM=%time:~3,2% 
set /a StartH=%time:~0,2%

(
    echo del d:\database\kup.bak
    echo set /a StartS=%%time:~6,2%%
    echo set /a StartM=%%time:~3,2%%
    echo set /a StartH=%%time:~0,2%%
)>test.txt

------解决方案--------------------
老老实实的该用几个echo就用几个，瞎折腾这个有啥用？