Abstract: Taking a surface coal mine as the background, according to the field investigation, the area is divided into the old slide mass zone in the north, the new slide zone and the high step area in the east. On the basis of the initial determination of landslide cause, using limit balance method, the study on the slope control method was carried out for the area of three safety hidden danger areas of the mine to determine the slope-cutting scheme of the landslide area, the safe distance from the north external dump and the mining face, and discharge height of the east goaf, and reasonable slope angle, which realizes the safe production of open-pit mine and maximizes the recycling of coal resources.