Abstract: The research introduced the topography and geomorphology and climate character in mid-part low altitude belts on the northern slopes of Tianshan Mountains. With the 3-level classification system of kind, group and type, the grassland types were divided into 2 big sorts and total 10 types. The main forage plants of mid-low altitude belts on the northern slopes of Tianshan Mountains were investigated; the different grassland types were arranged rationally according to the different ingestion behavior and habit of livestock. The utilized pasture of three seasons of spring-autumn, summer and winter were carved up in the light of climate, topography and grassland type etc., and the grazing method in the low altitude belt grassland was put forward.