Abstract: The closure of coal mines is the final stage of mining development, and it still has an impact on the safety and environment of surrounding communities. The goaf formed in the history of coal mine production not only causes a series of natural disasters, but also has a significant impact on the surrounding environment. Studying the geological environment protection and land reclamation of coal mines after closure is of great significance. This paper takes the geological environment protection work of Yuejin Coal Mine in Xiwu Banner, Xilinguole League as an example, analyzes the shortcomings of the original construction plan of the coal mine company, and proposes corresponding optimization and improvement measures, such as optimizing the living area of the open-pit mining pit, the waste disposal site, etc., to solve the damage to the local environment caused by mining engineering and better meet the current governance needs.