Abstract: To adapt to the rapid development of grass industry, improve the yield and quality of alfalfa and increase the benefits of alfalfaplanting, the experiments onfoliar fertilizers and plant growth regulatorswere conducted, 2 suitable foliar fertilizers were screened out from 5. The results showed that the yield of alfalfa increased more than 20% under the treatments of KH2PO4 and Ausnutria, and the crude protein content increased significantly by 9.37%-10.62%, and crude fiber content was reduced by 5.91%-4.36%. As a result, KH2PO4 and Ausnutria were recommended as foliar fertilizers during the growth period of alfalfa with the concentration of 1000 times and 500 times.