Abstract: Shendong mining area is a China’s important coal production base and a typical high intensity mining field, which is also a typical fragile ecological environment of arid and semi-arid areas. The coordinated development of coal production and ecological environment in high intensity mining area is an important research topic in the area. Aiming at the lack of water resource in arid and semi-arid,fragile ecological environment in Shendong mining area,this paper puts forward the partition of hydrogeological structure and the water-preserved mining by studying the structure charac- teristics of hydrological geology, coal strata structure type, etc. On this basis, according to different hydrogeological structure types,it puts forward the key technologies of water-preserved mining such as coal mining important water source area in mining area,thick bedrock aquifer,burning rocks aquifer and thin bedrock aquifer and the use of mine water resources. Finally,combining with the typical mine,it applies the key technologies into engineering practice and achieves a good application effect.