Abstract: Athlete security policy not only concerns athletes' performance improvement and their career planning, but also affects the sustainable development of competitive sports. Based on the case studies of developed countries, the author summarizes five factors which would promote the effect of athlete security policy on athletes' career transition: complete legal system, comprehensive insurance categories, typical programs and projects, systematic education and vocational training, and extensive social participation. The more the athlete security policy conforms to these five factors, the better the athletes achieve career transition.