Abstract: The ecological status of Chaohu Lake Basin is particularly important in Anhui province and even in the whole country. In recent years, the environment of Chaohu Lake Basin has been significantly improved by the government, but there are still some environmental problems. Combing the current relevant laws and regulations for Chaohu Lake Basin, summarizing the current legislative situation, we find that there are problems such as unbalanced legislative structure and scattered system, insufficient ecological legislation, imperfect legislative content and so on. According to our country' s ecological civilization concept and practical experience of comprehensive legislation in the basin, we should make comprehensive legislation in Chaohu Lake Basin, formulate the Regulations on Protection of Chaohu Lake Basin, improve the ecological concept of legislation, and construct and improve the legal system from the aspects of improving the overall environmental protection planning system, environmental impact assessment system, ecological protection compensation system and government environmental responsibility investigation mechanism, so as to provide institution guarantee for ecological protection in Chaohu Lake Basin.

Key words: legislation for Chaohu Lake Basin, comprehensive legislation, ecological concept of legislation; institution guarantee