On the basis of data from questionnaire survey of Jiangsu knowledge competition among college students,this paper em- ploys factor analysis to describe the study subjectivity of college students,which can be divided into the following five dimensions,i. e. learning behavior factor,preference factor,self - confidence factor,motivation factor and obstacle factor. Then,taking the test results as dependent variables,the paper explores the actual impact of college students’learning subjectivity,educational background,family background and personal endowment on individual performance. Regression analysis verifies that learning subjectivity plays a positive role in learning effect; in addition,the variables like students’grade,undergraduate or junior college,high school from city or town, father’s education level,mother’s occupation,gender,and kinds of reading books also have significant effects on students’competi- tion score.