Abstract: The degradation of lake ecosystem due to pollution is a long- term problem faced by China. Therefore, the ecological restoration technology of lakes is very important. To explore the main direction of lake ecological restoration technology in the future, the existing lake ecological restoration technologies at home and abroad were comprehensively analyzed. The three most common and most problematic forms of degradation, such as lake eutrophication, lakeside degradation and reduced biodiversity, were summarized and discussed by analyzing the mechanisms and forms of lake ecosystem degradation. Different ecological restoration techniques were discussed for these three types of degradation, the principles and guidelines of ecological restoration were summarized, and the advantages and disadvantages of different ecological restoration techniques were discussed. Finally, we put forward suggestions on the structure of the lake ecological restoration project and matters needing attention, which can provide a basis for the future ecological restoration of lakes.