Abstract:Sedimentary metamorphic iron deposit occurred in Tushan area of Cangshan county. It is a waterfilled fracturekarst deposit with medium hydrogeological conditions. In this paper, hydrogeological characteristics of Tushan iron deposit have been introduced in detail, main water bearing rock groups of the deposits have been divided, and its waterfilled conditions have been analyzed as well. The model of hydrogeological unit boundary conditions has been determined. By using horizontal tunnel water inflow calculating formula, each horizontal tunnel water inflow has been predicated. It will provide more detailed data mining conditions for design and production of Tushan iron deposit in the future.