Abstract: After mining over years,P₃c aquifer groundwater formed an "underground reservoir" conducted by separated fissures and T₁j aquifer groundwater formed an "unified aquifer" conducted by extensional fissures in Nantong coal mine.We conclude that aquifer destruction patterns are:mining destruction,destruction of sealed adverse borehole destruction of water conductive fault.The "unified Aquifer" in T₁j and "underground reservoir" in P₃c are favorable area for searching groundwater in hilly mining subsidence area in Southern China.