Abstract: Based on the data of seven national forest resources inventory and second-class forest inventory in Yunnan province, the contribution of carbon sequestration of shelterbelt in Yunnan province was calculated by biomass expansion factor method. The results show that as follows.(1) The carbon storage of shelterbelt in Yunnan province increased from 88,680,300 t in 1988 to 376,350,100 t in 2018, with an average annual growth of 8,219,100 t, the contribution rate of shelterbelt carbon storage to the total forest carbon storage in Yunnan Province increased from 17.59% to 41.63%, and the total average carbon density of shelterbelts showed an upward trend in fluctuation.(2) From the perspective of different age levels, the contribution rate of carbon storage in middle-aged forests(between 20.20% and 27.44%) was the largest, while that in young forests was the lowest; the total average carbon density of shelter forest increased with the increase of age class, and the carbon density of mature forest and over-mature forest decreased with time.(3) From the perspective of different origins, the natural shelter forest was the main contributor to the carbon storage of shelter forest in Yunnan province, and its contribution rate(between 95.80% and 99.53%) decreased gradually, while the carbon density of natural shelter forest increased with the increase of age; compared with natural shelterbelt, the carbon storage and density of artificial shelterbelt was at a low level, and the total average carbon density of artificial shelterbelts was on the rise. The carbon density of artificial shelterbelt of different age classes was mature forests > near-mature forests > over-mature forests > middle-aged forests > young forests.(4) From a geographical point of view, Diqing prefecture was the main contributor of carbon storage of shelterbelt in Yunnan province(the contribution rate is 17.65%), and the carbon sequestration of shelterbelt in northwest Yunnan accounts for 44.19% of the total carbon sequestration of shelterbelt in Yunnan province. Yunnan province should pay attention to the smooth maturity of middle-aged and young shelterbelt, strengthen the management of artificial shelterbelt, and enhance the carbon storage capacity of Yunnan shelterbelt.