With the increasing diversity of university courses and the improvement and promotion of freedom elective system, college English courses are also gradually incorporated into the range of elective courses. And it is found that students have obvious preferences in the choice of those courses; these preference are particularly evident in college English Elective courses. This paper firstly analyzes the current situation of college English elective courses, using the principal component analysis method carries out research on a variety of influencing factors of university English elective student preference, on this basis, to further empirical research on their preferences impact factors, eventually it can be found that the preference influence factors of students play a role in promoting for the diversification adjustment of college English elective courses.