Abstract: A field comparative study of 16 alfalfa varieties introduced from America，Holland, and domestic was carried out in Beijing area. The characteristics including natural height, fresh yield, dry yield and the ratio of Stem/Leaf were tested．The results showed that there were significant differences in characteristics of growth and development among 16 alfalfa varieties. And these characteristics were evaluated comprehensively by the membership function and cluster analysis method. And Xinmu 1 and Liangmu 5 were suitable for spreading and planting in Beijing area．