Research Progress of Ecological Environment Profit and Loss Analysis of Highway Road Area in Karst Landform

Karst is a kind of ecosystem with peculiar topography, special physical, chemical and biological structure and ecological function. With the continuous development of China's urbanization, the highway network has been continuously expanding and improving, the construction of highways in karst areas will inevitably damage the original local geomorphic structure and ecological environment, and the solution of the contradiction between highway construction and ecological protection has become a hot research topic nowadays. The article summarizes the research progress of ecological environment profit and loss analysis of highway road area in karst landform, introduces the characteristics of karst landform and the impact of highway construction on it, and then focuses on the research results of the selection and investigation of ecological evaluation indexes of highway construction in karst area, environmental impact assessment, and ecological environment profit and loss assessment methods. The current research progress and future development direction are summarized, aiming to provide theoretical support and practical guidance for the sustainable development of highway construction and environmental protection in karst region.