The changes of Soil quality of Lucerne with different cultivating ages were studied comparatively by comparing soil properties of Lucerne.The results indicated that the different cultivating ages of Lucerne had different effects on soil properties. All in all, the effects improved with lucerne cultivating ages increasing.The organic matter,total N, total P and total K of lucerne with different cultivating ages had no obvious differences among different layers of Lucerne, but available nutrients,bulk density and so forth had significant differences among different layers of Lucern.