Abstract: This paper is designed to explore the relationship between social support, psychological capital and employability of college students. Using social support rating scale, positive psychological capital questionnaire and college employability questionnaire, 780 college graduates from five universities were investigated. The results are as follows:(1) there are significant correlation between social support, psychological capital and employability of college students; (2) social support and psychological capital have a significant positive predictive effect on employability; (3) the psychological capital of college students plays a partial intermediary role between social support and employability.