Abstract: This paper discusses the methods of investigations and assessments of the nationwide mine geoenvironment launched by China Geological Survey and introduces the content, technical line and working method for the investigations and assessments. Then the indicator system and methods of mine geoenvironmental impact assessments are put forward based on the investigation data. Finally, the mine geoenvironmental impact assessments caused by mining are made according to different minerals and regions, by using the mine geoenvironmental investigation data of 6 provinces. This provides a foundation for carrying out investigations and assessments of the nationwide mine geoenvironment and integration of the results in the next step.