Abstract: Lewis’s Dual Economic Structure Theory was based on the market economy with free competition.The market economy in present China is not perfect,which can only be called government-engineered market economy.Lewis’s dual economic structure theory was therefore distorted as the urban-rural dual economic structure.This fostered the peasant workers market,development of labor intensive industry and export-oriented development model.The demographic dividend period with plenty of peasant workers supply is going to its end,and the Lewis Turning Point is coming.The “anti-driving mechanism”of China’s social and economic development model has been strengthened.The export-oriented development model based on peasant workers market has come to its end.

Key words: dual economic economy；urban-rural dual system；Lewis&rsquo, s turning point；anti-driving mechanism