Abstract: At present stage, the comprehensive harness of Erhai Lake basin is arduous and an effective and perfect comprehensive management system has not been formed. The basin management fails to meet river regulation and environmental protection requirements of Erhai Lake basin, the pollutants into the lake has not been effectively controlled and the basin water ecological security system has not been established. This paper focuses on the comprehensive harnessing of the rivers entering Erhai Lake and put forward 5 major measures that include establishing Erhai Lake basin management system, conducting sewage interception and control, restoring the ecology of the rivers entering the lake, carrying out the basin ecology construction and constructing high effective water saving irrigation project for the purpose of establishing the basin management system, improving the flood control system, building clear river channel, increasing the flow into the lake, reducing the total amount of pollutants in to the lake. The planned projects include regulating 201.32 km river channel, newly building 286.04 km river dike and dredging 35.92 km river channel and maintaining the existing embankment of 15.66 km.