Climate change leads to the evolution of the tundra in Changbai Mountain from shrub tundra to herbshrub tundra, which has an important impact on soil respiration and carbon cycle. In order to study the effect of vegetation change on soil respiration of tundra, we selected typical communities of tundra in Changbai Mountain to measure and compare the seasonal dynamics and differences of soil respiration under different herbaceous coverage. The results showed that: (1) during the growing season, the soil respiration rate varied significantly in different change stages among the three communities, and all showed singlepeak changes. The seasonal changing trend of soil respiration was not affected by the increase of herbaceous coverage. (2) The increase of herbaceous coverage significantly affected soil respiration. With the increase of herbaceous coverage, soil respiration rate gradually increased. (3) Soil respiration was different in different plant communities. Under the condition of the same herbaceous coverage, the soil respiration rate of Rhododendron aureumDeyeuxia purpurea community > R. aureumSanguisorba officinalis community> Vaccinium uliginosumCarex siderosticia community. (4) The growth effect of soil respiration in different communities was different. The growth rate of soil respiration was the fastest in the R.aureumD.purpurea community, followed by V.uliginosumC.siderosticia community, and R.aureumS.officinalis community was the slowest. At the same time, the increase of herbaceous coverage significantly altered the gap of soil respiration among the three communities.