Abstract: Aiming at the problem of water discharge and drainage in working face and goaf in large water mine, this paper introduces the application technology of the centralized drainage tunnel at the bottom of the working face, taking Gao Jia Bao coal mine as an example. In this paper, the layout, quantity, horizon, section and slope of the centralized drainage roadway in the working face are mainly discussed, and the main advantages and applicable conditions of the centralized drainage roadway in coal seam floor are summarized. It further shows that the layout of the centralized drainage roadway is an effective way to solve the water inrush and drainage in the coal mining face and goaf of the large water mine, which has important practical significance for ensuring the safety production of such mines.