Abstract: Through a thorough investigation and cause analyses on the critical Levee sections of the Liaohe River, and the evolution analysis of the water courses, the Makovieve method, the bankfull level method, the guaranteed rate of dominant discharge method and the main flood season average monthly flow method were used to calculate the river dominant discharge, respectively. The regulation river width was determined based on the calculations using the main channel average width of previous years method, empirical formula method and the water course width under current river dominant discharge method, full considerations of the characteristics of each river section, the coordination of up- and down- streams, as well as leaving space for the evolution of the river. With regard to the both banks ? gentle or steep bank, a comprehensive governance technology on critical levee section was proposed, which could provide technical supports to the flood control system of Liaohe River.