Abstract: From the perspective of demographic change and economic growth respectively,this paper discusses the changes of trends in labor supply and demand,and concludes that unlimited supply of labor has ended in China,which is clearly reflected in the phenomena of "difficulty in recruiting new workers".The fundamental change in the relationship between labor supply and demand does not mean the absolute shortage of labors,but it does mean that sufficient supply of labors will be determined by reasonable growth of pay for workers.The paper also explores the general situation of labor market in China,and concludes that job creation is still a priority in spite of low unemployment rate because labor participation rate has decreased for last ten years,which is a severe labor market outcome.At the same time,the structural problems in labor market are becoming more and more severe.To realize sufficient employment,it is still necessary for China to guarantee economic growth while improving job quality and increasing gains of workers from the economic growth.

Key words: labor supply； economic growth； labor markets

（ in Population & Economics, Issue 4 ,2012 ）