Abstract: The method of seed balls of clothing may raise the germination percentage of the seed and improve the intergrowth nitrogen fixation of the legume. It has an important meaning to improve the degradation meadow and promote the agricultural sustainable development. The result shows: In the comparison of inoculated “Xian Ke”, the alfalfa of American (ML323) does well in the many aspects, such as accelerate sprouting, the percent of root nodule and output increasing.