1. Education: Bachelor or Master: Any student with a bachelor's or master's degree can apply for a doctorate in an American university. If the undergraduate directly applies for a doctorate, the requirements for the applicant will be more stringent. Of course, there are also individual majors in individual schools, and doctors only recruit masters.

2, academic performance: GPA3.0+ (especially professional GPA, generally requires 3.3+): the GPA of applying for a Ph.D. in the United States is above 3.0, but this is only the minimum admission score. It is difficult to apply for a scholarship with such an average grade. If you want to apply for a scholarship, you must have a GPA of at least 3.3. If your classmate's GPA is not ideal, don't be discouraged. I suggest you prepare for the GRESUB exam carefully, as long as you get an excellent score.

3. Language scores: TOEFL 100+, IELTS 7 or 7.5 or English-speaking countries can apply for language exemption for more than 3 years.

4. Background requirements: Applicants must have sufficient research experience and background, have outstanding performance in professional fields, and have completed many courses at the master's stage, which is what we usually call the requirement of equivalent academic ability and equivalent master's degree. This is a necessary condition for studying in the United States. It is suggested that before applying for a Ph.D. in the United States, you should work or practice in institutions in related fields to gain experience, so that you will have an advantage in applying for a Ph.D. in the United States.

5. Documents: resume, personal statement, cover letter, purpose statement, school proposition composition, etc. The importance of documents is one of the important factors related to admission, and it is the stage for students' academic background to be presented to admissions examiners and tutors.