We conducted a 6year field manipulative experiment in Kobresia humilis meadow of QinghaiTibet Plateau to study the effects of clipping (stubbled 1 cm, 3 cm and unclipped) and fertilizing (12.75 g·m^-2 urea + 3.06 g·m^-2 diammonium phosphate, unfertilized) on the N, P ecostoichiometric characters of soil and plants in alpine meadow. We look forward to exploring the type of plant nutrient limitation, and providing information for the management, protection and restoration of the natural grassland. The results showed that: (1) clipping and fertilizing had no significant effects on total N, P contents and N∶P ratio in soil. No significant change was found in soil available N content, while the soil available P content was raised significantly after clipping. Neither the total N, P content nor the available N, P content in soil changed significantly under fertilizing treatment as a result of those available nutrients added into the soil was quickly absorbed by plants rather than stored in soil nutrient pool. (2) Both clipping and fertilizing increased the N, P content of leaf layer in community, and fertilizing decreased the N∶P ratio. (3) Experimental treatments did not changed the N, P content and N∶P ratio of legumes, but clipping increased the P content of grasses and the N content of sedges, decreased the N∶P ratio of grasses independently. Fertilizing increased the P content of grasses and the N, P content of sedges independently. Thus legumes had the highest levels of N content, while lowest P content was found in sedges as well as N∶P ratio in grasses. (4) Whether the leaf layer of community, grasses or sedges, N content was positively related to P content, N∶P ratio had no significant correlation with N content and was negatively related to P contents. For legumes, there was a negative correlation between N and P content, and N∶P ratio positively related to N content and negatively related to P contents. This suggested that the nutritional status of community and plant species were more restricted by P content. (5) The relative growth rate of community aboveground biomass was significantly positive correlated with the content of N, P in community, significantly negatively correlated with community N∶P ratio. This result was consistent with the growth rate hypothesis and suggested that the hypothesis applies not only to species level, but also to community level.