Jiangxi province is a large province of small hydropower，the small hydropower has made great contributions to the economic development for our province，However，due to historical reasons，most hydropower stations have not built ecological flow facilities，also failed to release the full amount of ecological flow， Resulting in dehydration reduction in the lower reaches of the river，It has a certain impact on the ecological environment of the lower reaches of the river.This paper by analysis and summary of the small hydropower in the whole province，to search the problem，to analyze the reasons，combined with the special work of cleaning and rectification of small hydropower in the whole province，to put forward relevant suggestions，it is hoped it will provide some reference for the cleaning and rectification of small hydropower in our province.