The experiment is to solve the problem of shortage of high quality forage varieties and to cultivate new forage varieties with high yield and salt tolerance,the single plant mixed breeding and line mixed breeding of wild forage legumes resources were carried out,a new variety'Longmucha'forage soybean with high yield and salt tolerance was selected.The results of the production test showed that the average hay yield of'Longmucha'on multiple years was 14 201.46 kg/hm2,compared with the control(Songnen),the hay yield of four experimental sites increased by 17.06%,15.16%,16.12%,and 16.45%.It grew well in saline soil with a pH value of 8.2.The research shows that'Longmucha'forage soybean has high protein content,good palatability,high digestibility and salt-alkali resistance,it is suitable to be planted in Heilongjiang Province.