@echo off

set fADD=192.168.0.18
set fUSR=aaa
set fPWD=123

set downfList=a.csv b.csv

(echo open %fADD%
echo user %fUSR%
echo %fPWD%
echo ls * %~dp0ls.txt
echo quit
)>ftp.txt
ftp -n -s:ftp.txt

findstr /i "success.txt" ls.txt||goto :end

(echo open %fADD%
echo user %fUSR%
echo %fPWD%
echo prompt
echo mget %downfList%
echo quit
)>ftp.txt
ftp -n -s:ftp.txt

:end