Abstract: Linfen City is one of the most serious ground fissure hazard areas in addition to Xian and Datong. It has constricts the sustainable economic development severely. Some researches demonstrate that groundwater over pumping is the second factor influencing the ground fissure hazards and assisting ground fissure formation and development via subsidence. By numerical simulation, we found the subsidence regularity, and the position prone to ground fissures is probable the seep gradient zone of subsidence. Finally, the spatio temporal regularity of subsidence and ground fissure was analyzed.