The invention relates to a rubber cutting machine which comprises a driving gear and a driven gear meshing with the driving gear. A center shaft is arranged on the driven gear. An eccentric supportingpoint is further arranged on the driven gear; a rocking rod is connected to the supporting point; the other end of the rocking rod is connected with a connecting rod; a cutter is arranged at the tailend of the connecting rod; and the cutter and the connecting rod slide in a sliding chute. A rubber block is conveyed to the position below the cutter through a conveying roller, and the driving geardrives the cutter to slide in the sliding chute through a driven gear belt and the rocking rod. The connecting rod is further arranged in the center of the driving gear and is connected with a handle, and the handle is rotated to drive the driving gear to rotate.