Abstract: Taking a surface coal mine as the research background, according to the characteristics of engineering geology, using the limit equilibrium method, the paper carried out slope stability evaluation for the first mining phase of flammable slope. By calculation, under the condition of ensuring the inner dumping following up the speed, the first phase mining scheme can meet the requirements of mining production. On this basis, combining with the actual situation, the paper studied slope control scheme of the second phase to determine the seam thickness, width, mining boundary, inner dumping site parameters and ensure open-pit coal mine safety production.