Hi:)
I'm a gratuated student from iran
I'm study math in iran but I'd like to continue my education at economice
Can I study in usa ? Assist me fore this.
Tanx

Yes, I think you can.
Let me just clarify: you have a bachelors degree in math now, and you want a masters degree in economics or another bachelors degree in economics?

I'm going to assume you want a graduate/masters degree:
See, it depends on the university. Some graduate programs have different requirements than others to get into graduate programs. If you have a university in mind check there requirements to see what you need for a graduate economics programme. You may need to take some undergraduate economics classes to get into a program. To get into a graduate programme you'll also need to take the GRE's which is just a standardized test.

Hope this helped some.