hi ,this is my net environment.
how can i make the pc1 and pc2 COMMUNICATION!

in a word ,i want to make vlan1 and vlan2 can be COMMUNICATION by routeos ,same to a cisco 3750 switch.

you mean, 'routed'?.. but RouterOS is routing by default, if you didn't block forwarding in Firewall Filter

and if you need a switch, not router, then just create bridge and add vlan1 and vlan2 to it