In this paper, taking the second round of environmental impact assessment of mineral resources planning for Jiangsu Province as example, the approach is introduced in detail. Through spatial analysis method provided by ArcGIS software, the environmental impact of mineral resources planning to ecological environment, geological environment, water environment, atmospheric environment and acoustic environment is given quantitatively. Based on the result of environmental impact assessment of mineral resources planning for Jiangsu Province, some valuable suggestions are also given. The application shows that GIS is a very practical and efficient method in environmental impact assessment of mineral resources planning. It can provide reasonable analysis processes, quantitative and visual results, which makes the environmental impact assessment more scientific.