By using data of rainfall and hydrologic sediment,the characteristics of erosion and sediment generation at Toutui river watershed in the Xinjiang Uygur Autonomous region is analysed systematically.The majoy types of erosion in Toutui river watershed are erosions of water,wind,gravity and man-made accelerated which resulted by irrational soical and economical action of mankind,specially,water erasion is the primary type of it.The characteristic of water erosion there,is erosioning by water of melted glacier and snow.The erosion and sediment generation show obvious variational characteristic of time and space.The region in elevation of 800一1 400m,the vegetation is shorter there,it is the main region of sediment generation.The main period of erosion and sediment generation is in Period of month 5th一8th.