The invention relates to a drum-type crushing roller for a coal mining machine. The drum-type crushing roller comprises a roller body, a connecting disc, a plurality of tooth seats and a plurality ofcut teeth. The tooth seats and the cut teeth are in one-to-one correspondence with each other. The cut teeth are fixed to the corresponding tooth seats. The tooth seats are distributed on the outer cylindrical surface of the roller body and are fixedly connected with the roller body. The tooth seat and the cut teeth are divided into a plurality of groups in the axial direction of the roller body.Each group of tooth seats are dispersed on one circumference of the outer cylindrical surface of the roller body. The distances between the tooth tops of the cut teeth and the outer cylindrical surface of the roller body become smaller from the middle group to groups at the two axial ends of the roller body. The connecting disc is coaxially fixed to one end of the axial direction of the roller body. A plurality of sawtooth-shaped crushing teeth are circumferentially dispersed on the cylindrical surface of the connecting disc. The coal crushing capacity is higher, and the service life is longer.