Based on DPSIR model, an evaluation index system of low-carbon rural tourism is constructed in this paper. And according to the relevant statistical data, an empirical analysis on low-carbon rural tourism in Mentougou is made using the entropy weight method. The results showed that the upward trend of low-carbon rural tourism development in Mentougou was not obvious, still in the middle-carbon stage, and there is a big gap to low-carbon rural tourism requires. At last, this paper introduced the limiting factor to dig out the factors restricting the development of low-carbon rural tourism in Mentougou. It shows that the weak awareness of low-carbon tourism, small financial input and lack of low carbon facilities, extensive management of rural tourism enterprises and poor quality of employees, as well as lack of awareness of rural renewable energy utilization and insufficient clean energy usage are the main factors.