Abstract:With a study of plant community succession on 5 stocking rates,herbage utilizational efficiency and risk\|benefit balance,it is suggested the sustainable development should follow:(1)no degradational principle of rangeland,(2)the maximum herbage utilizational efficiency,(3)the risk\|benefit balance,When stocking rate was no more than 2.67 sheep/hm 2 ,the proportion of grasses and plant biodiversity index and evenness were increased based on Artemisia frigida and short\|grass rangeland.The herbage utiliz...