Abstract: In order to ensure the sustainable exploitation of coal mines in Panxie area of Huainan, based on the geological characteristics of the mining area with thick topsoil layer, multiple coal seams, deep coal seam burial, high gas content, poor permeability and large ground pressure, combined with the current mining area succession of the mine and the existing production system, some design philosophy of mining scheme were analyzed with the purpose of make full use of resources, such as the way of extending depth, division of Mining area and working sector, control mode of coal seam (group) gas, program of groundwater disaster control, roadway system layout of mining area, etc. A set of design methods for safety reconstruction and horizontal extension in mine with high gas outburst under complex geological conditions were summarized. The studies would provide reference for safety reconstruction and horizontal extension ofcoal mine with similar conditions.