By use of DPS statistics, regression analysis, and other methods, an analysis is made of the herbage yield changes in the recent 10 years in five sites over the Qinghai Plateau (Henan, Gande, Qumalai, Haibei, and Xinghai) and the relationship between meteorological factors and herbage yields. The simulation results show that: Over the past 10 years, the highest annual herbage production was in Henan, an overall downward trend in Gande, and overall upward trend in Qumalai, Haibei,and Xinghai. In May, the variation amplitude of forage yields was the greatest at Xinghai and least at Haibei in five sites. From June to August, the variation amplitude of forage yields was the greatest at Qumalai, and least at Haibe. In August, during the formation stage of forage yields, there was abundant sunshine and ample rainfall, but the temperature was not high enough in Gande, Qumalai, Haibei, and Xinghai. In Henan, there was negative correlation between light and temperature during the growing season. A good fitting model of meteorological factors and the annual forage yields of the five sites is obtained, with the significance level being greater than 0.01, and the fitting results can be used as references for local livestock farming services.