The aging of the population is deepening, and the supply and demand of the labor market will face a reversal. The retirement age is a general trend. In order to explore the impact of the retirement age on the supply and demand of the labor market, this paper forecasts the supply and demand of the labor market in Jiangsu by setting up 3 deferred retirement age schemes. The results show that the retirement age will for the first time to postpone the time gap between supply and demand of labor market, to reduce the gap between labor supply and demand scale, But it is still difficult to reverse the trend of labor supply from supply to demand. In addition, the effect of the delayed retirement age on the labor market is closely related to the starting population, speed, target age, and economic growth rate of the late retirement.