Abstract: According to basic theory for integral regressive, the relation between meteorology factor and yield of pasture was analyzed, the aim was to clarity the effect of precipitation on yield of pasture at different procreation stage at high and cold area. The result showed that the positive relation effect is at the stage of earily-mid in April, from late in May to earily in July and late in August.When the amount of precipitation increased 1 mm, the yield of pasture at most increased 138.2,80.1,53.8 kg/hm^2. But the negative relation was at the stage of Mid-July and August, the yield of pasture at most decreased 23.1,43.7 kg/hm^2 with increasing 1 mm in the amount of precipitation.