The invention relates to a graded mining method of a coal-rock co-mining working face. The rock stratum strength f of different areas is judged in a graded manner, and mining is performed by targeted measures. If f<1.5, the rock stratum strength is grade I; if 1.5/=3.0, the rock stratum strength is grade III. When the rock stratum strength is grade I, a coal mining machine is directly used to mine the working face, and the coal mining machine uses external-rotation cutting during mining; when the rock stratum strength is grade II, the coal mining machine is directly used to mine the working face, and the coal mining machine uses internal-rotation cutting during mining; when the rock stratum strength is grade III, explosion holes are designed according the rock stratum thickness H1 of the working face before mining, explosion is performed after all the explosion holes are filled with dynamite, and then the coal mining machine is used to mine the working face through internal-rotation cutting. The graded mining method has the advantages that efficient mining of the coal-rock co-mining working face under complex conditions can be achieved, equipment wear is reduced by above 30%, the mining speed of the working face is increased by above 50%, and the method is worthy of popularization.