I am colorblind ,what kind of major can i take in university and what kind of job can i have in future?

Almost everything: Very few occupations require specific color perception. For example, many doctors are colorblind. Colorblindedess would make certain fields difficult such as advertising/graphics design, certain electronics fields in which wire color differentiation is important. Math, science, accounting, languages, education, engineering, and agriculture are examples of fields of study which are open. Good luck

No restrictions but: In the U.S., one cannot pilot a plane at night, so that rules out being a commercial or military pilot. Also, ophthalmology programs (eye doctor schools) might require one to pass a color vision test before acceptance into a program. A career in design that uses colors, such as interior design, or fashion design, will be harder for a colorblind person who cannot see many of the colors others see.

Exclusions: Color deficiency will limit your ability to distinguish especially subtle differences in color. The limiting occupations would include paint matching, certain types of electrical assembly, fruit grading, graphic art and some legal limitations such as major ship captain and some military and police jobs. Almost everything else is open, so study what interests you.