Abstract: Floods frequently occurred in Liaohe River in the the years. Although the work of river barrier clearance had been performed for several times, the illegal water-blocking barriers still increased, flood risks and safety in Liaohe River have attracted more and more attention. The history of river barrier clearance in Liaohe Conservation Area was analyzed; and the scope and objectives of river barrier clearance was established, based on the reconnaissance results of Liaohe River course. Also, the barriers clearance technology was studied in Liaohe River course, and the effects were discussed. Measures for implementing on the river barrier clearance were proposed, with respect to the problems found in the research. River course recovery is one of the main approaches to solve the flood safety problems, which help to achieve the win-win of flood safety and ecological security in Liaohe Conservation Area.