This paper explores the impacts of Chinese environmental cleaning campaigns in recent years. We use the 2013“floating dead pigs in Huangpu River” accident as a natural experiment，and employ the township environmental and economic data in Zhejiang Jiaxing City and the neighboring Jiangsu Suzhou city，to study the impact of Jiaxing environmental cleaning campaign on water environment and farmer income. The Difference-in-difference estimation shows that the water quality in Jiaxing substantially and significantly improved after the campaign，and the economic growth，the industrial development，and the fiscal income didn’t significantly change. Because of the shrinking pork industry raised the pork price，as well as the subsidy policy implemented by the local government，the farmer income in Jiaxing temporarily reduced，and rose up consequently. This paper identifies the causal impact of environmental campaigns on local environment and economy.