The invention belongs to the technical field of cutting equipment and particularly discloses a cutting device. The cutting device comprises a base. The base is provided with a support column and a cross beam, wherein the support column and the cross beam are connected in sequence. The cross beam is provided with an air cylinder. A piston rod is provided with an annular cutter. The base is providedwith a workbench. The support column is provided with a sliding rail, the upper portion of the sliding rail is inclined towards one side. The piston rod is provided with an empty cavity structure, and the annular cutter is provided with an air sucking hole. A sleeve is arranged between the annular cutter and the air cylinder. The sleeve and the air cylinder are connected in a sealed manner. The middle of the piston rod is provided with a push plate fixedly connected with the piston rod, the upper portion of the piston rod is provided with an air discharging hole communicating with the empty cavity structure. A cross rod is connected between the piston rod and the sliding rail, the cross rod and the sliding rail are connected in a sliding manner. The air cylinder is inclined when the crossrod is located on the upper portion of the sliding rail. The cutting device is mainly used for cutting annular leather, and the problem that the cutting effect is poor in the leather cutting processis solved.