Demographic dividend has contributed a lot to Chinese economic growth during the past 30 years. However, in recent years, the increase of population dependency ratio, with the constant “shortage of labors”, indicates that the traditional demographic begins to fade away. How to further search for the rest of the demographic dividend and defer the disappearance of the demographic dividend becomes a significant issue. It researches province regions on the degree of utilization of existing demographic dividend, which will be instructive for the relevant economic policies of making full use of the demographic dividend. In terms of contribution analysis, this present research is concerned with the postponement of demographic dividend and the influence on Chinese economic growth rate by human capital changes.