Based on the measured soil respiration(R s)，soil temperature(T 10)，relative water content(W r)andthe vegetation index(VI)in two shrub communities(plot 1 and plot2)in Tianlong mountain Nature Reserve，the relationships between Rsand the environmental factors wereanalyzed.The results showed that the seasonal variation in Rsin the two plots was of consistent trend，and that the highest R svalue appeared in summer，and the lowest value mostlyappeared inwinter，and occasionally did in summer whenever moisture was verylow.On a seasonalscale，the relationship of Rs with T10was highly significant in bothplots，and when the data from the measurement of less than 1/3 of water holdingcapacity were deleted from theanalysis，their correlationimproved；the relationship between R and Wr was significant onlys in the plot1.The relationships between R and VI were highly significant in the both plots.The explanatory power of the ssynthetic relations of Rs with both T10 and Wrincreased.The relationship between the residual of the temperature model of Rs and Wr indicated that lower threshold value of Wrin the plot 1 and 2 was 0.35 and 0.42 of the water holdingcapacity. Adding a VI variable into the synthetic model of Rs with T10 and Wr，the determination coefficient of the fitted modelincreased，and akaike informationcriterion(AIC)decreased to someextent.Among the three models of 3variables，the exponential-double power function of T10，Wrand VI was better than the other twomodels.And among the three vegetationindices，the ratio vegetation index model was better than the othertwo.The results can give some implications for accuracteestimation of local carbon efflux by using soilmoisture，temperature and vegetation factors.