Dredging is one of the most important measures of the waterway improvement,which always produces tons of dredged materials while improving the waterway.For a long time,the dredged materials produced by the waterway improvement projects have not been re-utilized.The simple and rough disposal of the dredged materials is not only a waste of soil resources,but also a pollution to the ecological environment.Based on the analysis of the characteristics of dredged materials and the actual conditions of the waterway improvement project of the Chuanjiang River,this paper explores two ways of utilization of dredged materials for improving the environment and engineering utilization of dredged materials,and puts forward a plan for the utilization of surface sand pebble dredged materials as building materials,bottom sand pebble and block dredged materials for constructing ecological conservation areas,which has received good investment profits and ecological effects,and may serve as reference for the utilization of dredged materials and the construction of inland ecological waterways.