Different fertilization approaches were used in the Kobresia humilis Meadow in Haibei Alpine Meadow Ecosystem Research Station in order to study the impacts on plant community structure and function.The results showed that:(1)Fertilization reduced the species richness,ranked in the following order:controlled trial>potassium>phosphorus>nitrogen>nitrogen-phosphorus>phosphorus-potassium>nitrogen-potassium>nitrogen-phosphorus-potassium.(2)The treatment,Shannon-Wiener index of nitrogen-phosphorus fertilization treatment was significantly higher than that of the controlled trial (P<0.05),while the other treatments had no significant effects on the Shannon-Wiener index.(3)Under the same fertilizer treatment,the important value of Gramineae,Cyperaceae and Leguminosae increased,but Forbs reduced;the important values of Gramineae and Cyperaceae were obviously higher than those of Leguminosae and Forbs.(4)Different fertilization (except potassium) treatments increased K.humilis meadow plant community height.(5)Potassium and phosphorus-potassium adding had no significant difference (P>0.05),while other nutrients and the combination of nutrients significantly increased K.humilis community aboveground biomass (P<0.01),and the order was that:nitrogen-phosphorus>nitrogen-phosphorus-potassium>phosphorus>nitrogen-potassium>nitrogen>phosphorus-potassium>potassium>controlled trial.(6)Under the different kinds of fertilizer,functional groups biomass ratio of K.humilis meadow changed significantly,Gramineae and Cyperaceae increased,Forbs reduced,and Leguminosae had no general rules.(7)Nitrogen-phosphorus and nitrogen-phosphorus-potassium were the best fertilization choices in this alpine K.humilis meadow on the Qinghai-Xizang Plateau,when comprehensive evaluated using the Entropy method.