Abstract: Hairy vetch（Vicia villosa Roth.） is the main green manure crops with character of drought tolerance,cold resistance, fast growth in north China,but there were little study on its hig-yield cultivation and seed breeding technology.So an experiment of the influence of sowing date,seeding rate and fertilizer rate on grass and grain yield of hairy vetch was carried out in the northern foot of Yinshan Mountain in Inner Mongolia.The results showed that the grass yield of hairy vetch was mainly influenced by the seeding rate,and the followed by seeding time and the fertilizer rate.The highest grass yield was in the treatment of sowing on May 10-25,seeding rate of 45.0～82.5kg/hm 2 and fertilizer amount of 45-135kg/hm 2.The effects of these factors on grain yield were different with on the grass yield and the influence was as follows： the sowing time fertilizer amount seeding rate.In conclusion,early sowing in good time（April 25-May 10 seeding）,rational close planting（seeding rate 15-60 kg/hm 2） and proper amount of chemical fertilizer（dap of 45-90kg/hm 2） were the key to obtain high yield of grain.