The black snub-nosed monkey (Rhinopithecus bieti; also known as the Yunnan snub-nosed monkey) is an endangered animal mainly distributed in Baima Snow Mountain nature reserve, Southwest China. Given the poaching and habitat loss of Yunnan snub-nosed monkey, this study aims to investigate the current status of living environment of the Yunnan snub-nosed monkey from the perspective of deforestation and provide applicable solutions to maintain the local environmental sustainability. Based on GIS mapping, this study identifies three deforested areas in Baima Snow Mountain nature reserve's core zone. This study further assesses the economic and environmental benefits of reforestation in terms of the carbon market policy in China that promotes the development of forestry carbon trading. Specifically, the QGIS-LTR software is utilized to estimate the carbon sequestration value of these three areas with the data of carbon storage (mostly in cold temperate coniferous forest) and the biomass values. The carbon sequestration potential and the corresponding values of reforestation in these three deforested areas are estimated.