Based on empirical test of China's economic policies, this article discusses the factors of potential growth rate changes, analyzes the relationship between interval of policy goal and policy framework and their variation tendency. Results show that, to deal with problems of China's economic growth and fluctuation in the process of global economy adjustments, macro stabilization policies and supply policies should be combined. In the situation of global economy slowdown, the government should contribute to a more balanced potential growth rate, have a good grasp of the regulation and control, and promote structural reforms of government revenues and expenditures. <<