The evaluation of sustainable development in mountain scenic spots can provide reference for the tourism development of in mountain scenic spots. This study takes mountain Heng as a case, collects relevant data through field investigation, and explores the ecological status by combining the tourism ecological footprint model, tourism ecological carrying model and tourism ecological footprint index model. The results show that the tourism ecological footprint of transportation and catering is relatively high. The overall ecological pressure value is -140813.2423 hm², the tourism ecological footprint index is -6.2477 hm², the TEFI value is ≤-1, and the sustainable level of tourism development is negative. The ecological footprint of Nanyue tourism area is severely depleted, and the sustainable level of tourism development obviously deviates from the normal track. Based on the loss ratio of ecological footprint account, the paper aims to strengthen the rectifying level of tourism ecology from the aspects of tourist capacity, practitioners, ecological development concept and business model, so as to promote its sustainable development.