Lucerne (Medicago sativa L,)is praised as the vanguard for soil conservation and the crown of her bage and noticed widely as it has good nature, the first is that it has strong ability to conserve soil and water with deep roots and exuberant leaves, and could be grown in every season, it is also thought as the best honey plants the second is that it has rich nutrients and good eatability, so,domestic animals like to eat it particularly the third is its fast growing, having much nodule bacteria, containning rich nitrogen, phosphorous and potassium, and being the plant for green manure in good-nature， its fresh and beautiful flower is its forth character, it is planted as the wonderful flower for green environment, It is suggested to raise the position of Lucerne in use and to let it play its rule it has in the development of agriculture, forestry, husbandry, sideline production and fishery.