Abstract: In order to study the parameters and economic benefits of slope mining under the occupation of industrial sites in open-pit mines, the western slope of Hongshaquan open-pit mine was taken as the research object.Two dimensional and three-dimensional stability numerical simulations were used to optimize the slope angle and determine the maximum slope angle; After determining the angle of the new slope, the resource recovery and economic benefits under different conditions are calculated based on whether the industrial site is demolished as a comparative factor.The results show that the maximum slope angle of the west slope of the Hongshaquan open-pit mine is 35°.On this basis, dismantling the coal storage yard increases the dismantling cost by 40.44 million yuan.Compared with before dismantling, the distribution of steep mining and stripping costs increases by 1 569.16 million yuan and 1 319.53 million yuan, respectively, the value of extracted raw coal increases by 5 230.52 million yuan, and the economic benefits increase by 2 301.39 million yuan.