Impacted by the riverside iron ore of Lihe river, the suspended matter content of Lihe river water body is much higher than that tunnel at exit of Luanhe-Tianjin water diversion. This article studied the settlement behavior and transport characteristics of suspended solds in process of LuanHe-TianJin Water diversion.The results show that the main factor that affect settling velocity of suspended matter is particle size, and the main factors influencing the removal rate of suspended solids content is initial concentration of suspended solids.Combining the reality of suspended solids transport in process of LuanHe-TianJin Water diversion,the paper got the conclusion that suspended solids mainly affect the riverside of Lihe river Luanhe-Tianjin water diversion, the content of suspended solids flowing into the YuQiao reservoir is fewer and is mainly ther particle size of <10 microns particles.In light of the pollutant feature of suspended solids in the water diversion,the paper put forward to reduce flow speed of water process, to increase the depth of GuoHe river and to grow aquatic plants before water into YuQiao reservoir so as to reduce the content of suspended solids.