Abstract: Based on the field investigation and remote sensing image interpretation of the main closed coal mines in the Hebei Province, the index system for geological environment impact assessment of closed coal mines is divided into 3 elements and 11 indexes. The fuzzy comprehensive evaluation method is used to establish the geological environment impact assessment model of closed coal mines. The weight of each index is determined by the analytic hierarchy process of improved index scale. The evaluation results show that among 118 large-scale closed coal mines, geological environment of 36 coal mines are determined as seriously and relatively-seriously impacted, 82 coal mines are slightly and relatively-lightly impacted. Serious and relatively-serious coal mines are mainly distributed in Yuxian mining area, Xuanxia mining area and Handan mining area. The main influencing factors of geological environment are land resources occupation, aquifer damage, mining subsidence and ground fissure, etc.