It is an important task to improve China's medical security system under the new situation to establish and improve the employee medical insurance outpatient coordination guarantee mechanism. It aims to comb the establishment background and historical of the individual account of employee medical insurance，extract the outstanding existing problems of the individual account，and put forward the suggestions on the reform of outpatient coordination guarantee mechanism，so as to ensure that the problem of employee outpatient security is properly solved，promote the sustainable development of employee medical insurance and the high-quality development of medical security.