Grassland, which occupied 40% of the terrestrial surface, is one of the most important terrestrial ecosystems on earth. Contributions of soil respiration in grassland ecosystems to global carbon cycle could not be neglected. Carbon storage in grassland ecosystems is huge, and its soil respiration is an important part of carbon cycle. Researches on responses of soil respiration to environmental change and human disturbance in grassland ecosystems play an essential role in estimation of global carbon budget and predication of climatic change. As stock grazing is one of the most important disturbances in grassland ecosystems, its effects on soil respiration are one of the main contents of researches on carbon cycles. Previous studies showed that responses of soil respiration to grazing disturbance were not consistent. This inconsistent results from many complicated mechanisms, which involved a lot of biological and environmental factors, including productivity and quality of litter, allocation of assimilative masses, root biomass, microbe biomass and biodiversity, enzyme related to respiration, nutrient condition, soil temperature and moisture, and so on, are closely related to grazing intensity. Some of these changes might accelerate soil respiration while some might inhibit soil respiration. For the leading mechanisms may change with time and place, different results of increase, decrease, and lost response of soil respiration to grazing presented in similar studies. Because of those inconsistent results, researchers could not estimate the effects of grazing disturbance on global carbon cycle. Henceforth, studies on contributions from various ways of effects of grazing on soil respiration and its components, and mechanism model construction should be put in force with more concerning on the complicated processes and different components of soil respiration.