关键词: 农业面源污染, 新型城镇化, 准自然实验, 多期DID, 内在机制

Abstract: To promote the green development in agriculture and rural area，as well as the rural revitalization strategy，it is of great significance to explore how new type of urbanization affects agricultural nonpoint source pollution（ANSP）. Based on the panel data of 159 prefecture cities of China between 2007 and 2019，the influential effect of new-type urbanization pilot policies on ANSP is evaluated using Differencein-Differences（DID）with Multiple Time Periods. The result shows that the new-type urbanization pilot policies can effectively reduce ANSP discharge. An analysis of the influencing mechanism reveals that the policies relieve ANSP discharge by enhancing environmental regulation and agricultural green technology. An impact analysis reveals that the impact on new-type urbanization pilot differs significantly depending on the city’s size and location in the eastern，middle，or western part of the country. The current new-type urbanization pilot policies can effectively reduce the ANSP discharge of eastern cities and large cities，while the influence is insignificant on middle and western cities and cities of medium and small sizes.

Key words: agricultural non-point source pollution（ANSP）, new type of urbanization；quasi-natural experiment, DID with Multiple Time Periods, internal mechanism