Based on a survey with 460 questionnaires from 2014- 2016 college graduated students from Guangdong, Jiangxi, Anhui, Shanghai, etc. We inspect the relationship among risk tolerance, behavioral preference and employment ability using risk tolerance criteria for college students. The result shows that college students who have low risk tolerance tend to have low self-perception of employment ability, other students have high self-perception of employment ability. Individual behavior preference plays a partial mediating effect on the influence of risk tolerance on college students' employment ability, but with the increase of risk tolerance, the direction of its impact will change. Then we should follow this trend to help college students build a correct understanding of risk tolerance and make the right choice; take care of college students' psychological health, help them keep a good Job-seeker psychological and form a reasonable employment preference; implement differential guidance to help college students to establish the appropriate career expectations, ensure proper job search.