Since the reform and opening up , China have sustained rapid economic growth , one of the important factors is the demographic dividend . Last three decades, due to population structure conducive to economic development arising from family planning , China had a significant effects in economic . But in recent years , the labor resources turned to the limited remaining from the unlimited supply and enhanced the level of education of youth , it lead to the decreasing workplace labor quantity in low-tech , low-cost , low- value-added and other labor- intensive industries affected . More and more attention , how to extend the period of the demographic dividend or the other way to substitute for demographic dividend of quantitative . In addition, not all regions in China are benefited from demographic dividend , especially in the southeast coastal areas which are no longer to develop labor-intensive industries for economic released the policy of emptying the cage for the new birds in recent years , with the western development strategy , China tried to move labor- intensive industries from southeast coastal to midwest area to balance the economic development of the regions. The major problem that southeast coastal areas facing is how to upgrade the industrial structure ? They have to establish dynamic comparative advantage to form a new competitive edge . Besides , another factor is when labor’s quality have improved , the industrial structure should be correspond upgrade at the same time , otherwise , the labor shortage and lack of employment issues will become serious continuously . This paper described the transforming process of the demographic dividend into demographic liabilities by integrating relevant information. First of all , analyzing the population policies that implemented in China and indicating the reasons for the early stage of the demographic dividend in China so that the population structure was conducive to economic development . Secondly , researching demographic dividend contribution to China''s economic development by combined with empirical research data . Finally, exploring the impact of the decreasing demographic dividend in China and their response to the policy for the disappearance of demographic dividend.