Abstract: In the Jiepailing mining area, during the combined exploration and mining of deep polymetallic ores, issues such as large water inflow in the pits and extensive karst ground collapses in the Yujia area occurred. Despite previous hydrogeological surveys and research in the mining area, the hydrogeological conditions, especially the potential water sources and pathways that threaten mine safety and damage the surrounding geological environment, are not sufficiently clear. This paper takes the Jiepailing mining area as the research object to investigate its hydrogeological conditions, employing conventional methods such as systematically organizing and analyzing previous hydrogeological data from various stages, as well as surface investigation, geophysical exploration, drilling, and pumping tests. The study focuses on analyzing the pathways of water filling in the mine pits. The results show: (1) A newly discovered northeastern fault, F₃₀₃, is located in the southwestern part of the study area. (2) The main pathways for water filling in the mine pits include: ① In the western part of the mining area, the absence of the aquiferous group between F₂₀₁ and F₃₂ leads to direct contact between the Hutian Group, Zimenqiao Formation, and Shidengzi Formation. Influenced by F₂₀₁, F₃₀₃, and F₃₂, this constitutes the most significant pathway for water filling in the mine pits; ② In the northwestern part of the mining area, the contact zone between the granodiorite porphyry body and the surrounding rock has good water-richness, forming a pathway for water filling in the mine pits. The primary sources of water are the groundwater of the western Hutian Group and Tianweixi water.The suggestion proposes execute curtain grouting on the west side of F₁, using the lower impermeable layer water measurement group to block water pathways within the Hutian Group of the Zimenqiao Formation, thereby interrupting the hydraulic connection between the mining area and the river water, as well as groundwater within the Hutian Group. The results of the study can provide reference for the implementation of water prevention and control work in the next step of the mine.