Abstract: There is a new trend that the retirees return to the labor market in the process of global aging.The speed of population aging in China is so fast that it is rare all over the world and the labor supply continues to decrease.Although the legal retirement age is relatively early,the labor participation rate of the retirees remains very low.Higher pension replacement rate,lower human capital level,rapidly changing labor demand,family care burden and unfriendly labor market system jointly hinder the retirees from returning to the labor market.Developing the potential of human resources for the elderly is an important measure for all countries in the world to actively respond to aging.At present,the most effective measure for China's elderly human resources development is to delay the legal retirement age.The biggest challenge is the short board of human capital.It is necessary to establish a lifelong learning system and an employment friendly labor market system.

Key words: retirees, labor participation rate, labor market, pension