The invention provides a roller type coal screening machine. The roller type coal screening machine comprises a body, a baffle, a screening shaft assembly and an electric push rod, a coal inlet is formed in the upper portion of the body, a bypass outlet, a small pea coal outlet and a large lump coal outlet are formed in the lower portion of the body in sequence, and the bypass outlet is opposite to the coal inlet in position; the baffle is located below the coal inlet in the body and is hinged to the two side walls of the body; the electric push rod is connected with a hinge point at one side through a lever on the outer side of the body; and the screening shaft assembly comprises a plurality of rolling shafts, the multiple rolling shafts are arranged in a step-wise inclined mode from the tail end of the baffle in sequence, and each rolling shaft is provided with a motor for independent control. Compared with the related art, the roller type coal screening machine has the advantages that because the screening surface has a certain inclination angle, the phenomenon that normal coal-fired power generation is influenced due to coal blockage, motor burnout and the like is avoided under the conditions of large loads and continuous operation.