Abstract: It is difficult to find out water source and water-conducting channels in some coal mine with complex hydrogeological conditions,and simplex technology of water control may be not satisfying in this kind of coal mine.Geophysical prospecting,site reconnaissance,flow monitoring in sections of rivers,and analysis of exiting hydrological and geological data are all used to find out water source and water-conducting channels,and compositive water control technology is studied for them.Take the No.7coal mine of Pingmei Group for example,many methods are adopted to find out the water source and water-conducting channels of No.7coal mine,and the scheme of hardening part of river way and intercepting water-conducting channels by grouting is worked out.The effect evaluation of the scheme shows that water source and waterconducting channels of No.7coal mine are located accurately,and the effect is satisfying.Applying many methods synthetically can accurately find out water source and water-conducting channels in the coal mine with complex hydrogeological conditions,and compositive technology of water control can be satisfying.