Abstract: Based on the mining conditions and development status of Huolinhe North Open-pit Coal Mine, in view of the problems of adjacent coal mining area steering, coal column mining in the mining section, tight of the inner dump space, the stability of composite slope of stope-inner dump is analyzed to solve the potential slope safety problems caused by the landslide area of internal drainage pressing foot, mining and timely pressing slope, determine the final mining form and mining mode of the coal pillar area in the mining section, improve the coal resource recovery rate, the mining and stripping project plan during the transition period of the mining area is planned in detail, and the inner dumping space is optimized to avoid the outer dumping area, which provides guarantee for the safe and efficient production of open-pit coal mine.