In order to support the water prevention and control work after the upgrading and transformation of Hudi Coal Industry and ensure the safe production of the mine, through the analysis of the geological and hydrogeological conditions of the mine, combined with the analysis of the relevant data of the mine water inflow, rainfall and output, it was concluded that the sandstone aquifer water in the roof of the coal seam and the Ordovician limestone aquifer water in the floor had obvious influence on the mining of No.3 coal seam. The main water filling channel of No.3 coal seam mining was the roof water conduction fracture zone formed after coal seam mining and the water conducting structures such as large faults and collapse columns. The mining face should be detected in advance before approaching the water conducting structures such as large faults and collapse columns, so as to provide guarantee for the safe production of the mine.