Abstract: Xinzhuang iron mining area is a typical iron ore of metasomatic skarn contact type, and the main aquifer is Ordovician limestone. The conditions of the groundwater recharge runoff and drainage, the characteristics of the aquifer and water rich property of fault were analyzed in the mining area. The laws of water rich property in the mining area were firstly summarized. It is concluded that the ore pit water inflow is mainly controlled by the above limestone and also influenced by the fault structure. Due to the influence of the fracture filling, the water inflow of the fault is greatly varied, which will increase the risk of water invasion and seepage and also threaten the production safety directly. The research above can provide a reference for preliminary exploration of domestic mines of the same type, and provide the basis for the later mine exploration.