Abstract: Against the problems of siltation caused Liaohe River main channel rising, flood control ability decreasing, and flood threat to embankments during flood season, a river dredging engineering and comprehensive treatment program was proposed. The dredging scope of critical river in Liaohe was designated, five dredging sections of Liuhe-Kalima-Liujianfang-Panshan Dike-Shuguang Bridge and Shifosi Dam-Lujia Bridge were designed, and the dredging quantity was calculated and verified by overlapping the designed and the present sections. The total dredging length is 194.79 km, and the dredging quantity is 63.7×106 m³. Furthermore, the ecological man-agement to the embankments of Liaohe River was designed, which covers a shoreline length of 1 064 km, and an engineering length of 625.6 km. As a result, a comprehensive target was achieved by stabilizing the river and eliminating the critical risk levee sections.