This study investigated the short-term effects of simulated warming on soil organic carbon pools and plant biomass in alpine swamp meadow. Open-top chambers were used to simulate climate warming. Three treatments were simulated in our experiment: CK (control), T_1 (temperature increased by1.5-2.5 ℃), and T_2 (temperature increased by 3-5 ℃). The results are as follows. (1) The soil microbial biomass carbon (MBC) in T_1 plots increased significantly. In T_2 plots, the soil microbial activity might be inhibited due to the over rising temperature, thus the soil MBC was not affected obviously. (2) Soil organic carbon (SOC) at 0-20 cm soil depth in the warming plots (T_1, T_2) was significantly higher than that in CK plots. The SOC at 20-30cm soil depth increased obviously in T_1 plots, but this positive effect was not significant in T_2 plots. (3) Warming(T_1, T_2) increased dissolved organic carbon (DOC) at 0-20cm soil depth but the DOC at 20-30cm soil depth was not significantly influenced.. (4)Warming(T_1, T_2) showed obvious positive effects on aboveground biomass (AGB), and the greater increase in temperature, the more increase in above-ground biomass. Underground biomass(BGB) increased in T_1 plots, in contrast, the BGB tended to be inhibited in T_2 plots. (5) There were significant positive correlations between SOC, MBC and DOC, indicating that the changes in soil MBC and DOC were restricted by the variations in soil SOC.