The open top chambers (OTCs) were introduced to increase soil temperature in order to explore effects of global warming on soil moisture,plant biomass and soil respiration rate of subalpine meadow in northwestern Yunnan province.The results indicated that average soil surface temperature was increased by 1.56℃ compared with the control;warming effects was more obvious in winter than in summer.Moreover,the temperature enhancement obviously increased the aboveground biomass(P<0.05),which was 148.76 g/m~2 higher than the control.At the same time,the increase of temperature promoted the expanding of root system into 10 to 20 cm soil layer.The soil respiration rate of warming treatment and control in both summer and winter showed a single peak curve.The maximal value appeared at 14∶00,and the maximal soil respiration rate in summer was 5.66 mumol/(m~2·s) while it was 2.79mumol/(m~2·s) in winter.The soil respiration rate in summer was 2.87 nm/(m~2·s) higher than that in winter.Correlation analysis indicated that the correlation between soil respiration rate and soil temperature was significant (P<0.05),however,a significant negative correlation was observed between soil temperature and soil water content (P<0.01).