Abstract: In order to scientifically evaluate quality of forage from different natural grassland types, principal component analysis was used for comprehensive quality assessment and quantitative assessment on the basis of routine analysis. As shown by integrated scores obtained through principal component analysis, advantages and disadvantages of different natural grassland types were objectively evaluated. The results show that the forage from alpine grassland had the best quality, followed by that from bottom land meadow, alpine meadow, temperate desert, temperate desert grassland and temperate grassland.