Abstract: Due to the rapid population growth in Siziwangqi,and interval grassland cultivated land,both the needs of agriculture animal husbandry development,agriculture cultivated land is cultivated in hot season and half-bare in cold season for a long time,infertility and half dry climate,land degradation in livestock,thus,under the condition of less grass and more cattle,grassland is depredating gradually and ecological environment is very severe.Developing the industry of alfalfa planting in local area can drive the industries development of planting,processing,animal husbandry,transporting etc,and provide a lot of jobs,and promote the sustainable development of local economy.At the same time,the behavior also helps curb cultivated land and grassland degradation,realize sustainable development of the economic and environmental resource,adapt to the development road of sustainable economic development,social progress and sustainable utilization of resources,environmental improvement,and the ecological cycle.