Abstract: To realize the green mining of Yushenfu Mining Area, one of the major coal resources in China, and protect the local ecological environment, it is required to adopt the technology of water-retaining and mining. Based on the overviews of the recent achievement and the latest development of coal mining under water-preserving, we sum up the theoretical development of water-preserved mining technology and the current situation of engineering practice. In addition, the development trend in this field is pointed out. The results show that the core of water preserved mining is to accurately predict the development height of water flowing fractured zone. According to the hydro-geological conditions and the physical and mechanical properties of the strata in the main coal seam, the spatial relationship between the coal seam, the primary key layer and the aquifer is determined. It is the development trend of water preserved mining to accurately predict the height of water flowing fractured zone and to study the storage condition of groundwater transfer.