Labor participation rate reflexes the degree of labor force of a region to participate in social and economic activities and, meanwhile, reflexes the dynamic status and development status quo of economic activities. What the labor participation rate depends on is explained by economists by all kinds of theories from the angle of individual and family,including wage change rate,family time arrangement,tax-cut policy, rational expectation and so on. With the deepening of the research, the reality explanation by theory is gradually increasing.