Active fiscal policy is a series of counter‐cyclical fiscal measures adopted by governments in response to macroeconomic cycle fluctuations, and it is used by countries around the world to stimulate consumer demand and boost economic growth during economic recessions. In this paper, from both theoretical and empirical aspects, we firstly summarize the content and tools of active fiscal policy in China and conduct a comparative analysis of different tools, secondly, briefly describe the history of active fiscal policy in China to lay the foundation for further analysis of the effects of active fiscal policy and implementation of policy adjustments, and then, conduct an empirical analysis using a regression approach on the active fiscal policy in China since 2008 to investigate the After that, the effect of fiscal policy on economic growth and investment in China is analyzed by regression. Finally, this paper puts forward relevant policy recommendations and situation analysis accordingly.