I am a passing IELTS teacher, and different training institutions have different requirements for IELTS teachers. But I can give you a minimum requirement.

First of all, look at what kind of IELTS teacher you want to be:

First, you must have taken the IELTS test, but you didn't. You don't know how to tell students the basic process and preparation. The bureau won't want you either.

Second, you should not get less than 7 points in the single subject you want to teach, such as reading. Some colleges and universities require no less than 7.5 points, some require no less than 6.5 points, and some require no less than 7 points.

Third, you have your own methods and opinions on IELTS test questions and test rules. And you can clearly explain the ideas of the exam and the methods of preparing for the exam to students. This is what the organization most wants to see, and it is also your own characteristic.