Groundwater refers to the water occurring in rock voids, usually also refers to the water in saturated aquifers below the underground water surface. It is an important part of water resources and one of the essential water sources for urban, industrial and agricultural water. In recent years, excessive exploitation of groundwater, infiltration of surface sewage and poor public awareness of protection have led to a series of environmental problems, seriously affecting normal production and life. According to Ministry of Water Resources of China, it is systemically concluded the current situation of ground water pollution, the causes, and features. In addition, existing treatment methods are summarized to provide basis and suggestion for ground water treatment in future.