Please help me, I want the mikrotik router PPPoe to reconnect (disconnect/connect) every day to obtain new ip address in internet...
Can somebody show me a script for? may use a scheduler?

You can use a scheduler to run once at day with this script

/interface pppoe-client disable pppoe-client-WAN
:delay 2s
/interface pppoe-client enable pppoe-client-WAN

where "pppoe-client-WAN" is your client interface name
Regards.