Rubber cutting device for rubber open mill

The utility model discloses a rubber cutting device for a rubber open mill, which comprises a supporting seat, two compression rollers arranged on the supporting seat and a material receiving box arranged below the compression rollers, and further comprises a rubber cutting mechanism which comprises a rubber cutting knife abutted against one of the compression rollers and a power piece for driving the rubber cutting knife to cut rubber, the extension piece is arranged at one end, far away from the compression roller, of the rubber cutting knife and is used for adjusting the rubber cutting knife to abut against the compression roller; and the locking part is arranged on the extension part and is used for locking the rubber cutting knife to abut against the compression roller. According to the rubber cutting device, the extension part and the locking part are arranged, the extension part reduces the distance between the rubber cutting knife and the compression roller until the rubber cutting knife abuts against