Since October 2016，human infections with A（H7N9）virus in China have significantly increased，drawing extensive concern worldwide.Until now, 460 cases of A（H7N9）virus infection with 78 deaths were reported. A worldwide outbreak is almost inevitable, once H7N9 viruses obtained the virulence to sustained humantohuman transmission.Thus，there is an urgent need to develop effective vaccines. The present review summarizes H7N9 vaccines under ongoing clinical trials，and evaluates the results of completed clinical trials.