Ecosystem respiration(ER)and soil respiration(SR)are key components of grassland ecosystem carbon emissions and are extremely sensitive to climate change. Alpine meadow is one of the main grassland types on the Qinghai-Tibet Plateau and its response to climate change has an important influence on regional carbon emission. In this paper, we conducted in situ warming experiment to investigate the response of ecosystem respiration and soil respiration to warming in an alpine meadow in the Qinghai-Tibetan Plateau from 2012 to 2016. The results showed that there was the interannual variability of the warming effects on ER in the alpine meadow. In 2013 and 2014, warming had no significant effects on ER, but warming significantly increased ER in other years (P<0.05). Five-year average of ER and SR increased by 22.3% and 67.1%, respectively, under warming compared to control. The proportion of SR in ER increased significantly under warming relative to control (P<0.05), and the highest increase reached 59.9%. ER and SR were positively correlated with soil temperature (P<0.05), not soil moisture (P>0.05). In control plots, soil temperature explained variations of ER and SR by 33.0% and 18.5%, respectively. Under warming, the soil temperature explained variations of ER and SR by 20.5% and 13.0%. Under warming, the temperature sensitivity of SR increased significantly, while the temperature sensitivity of ER have no significant change. Overall, the carbon emissions and soil carbon loss may increase in the future climate warming scenario in alpine meadow ecosystems on the Qinghai-Tibet Plateau.