关键词: 服务业发展, 非线性阶段性, 逆三次函数模型

Abstract: The proportion of service industry in China has been lower and risen slowly over along period of time,which has become a puzzle of economic development process in China.Using theoretical and empirical analysis,this paper demonstrates that the proportion growth of service industry has nonlinear stage characteristic,and gives a kind of interpretation about the puzzle of service industry development in China.