The utility model relates to a cutting device, include: a pedestal. Cutting the mechanism, including the fixed block and cut the piece, the fixed block sets up on the base for the carrier tube body, cut the piece including portion of cutting and connecting portion, sets up on the base with cutting a slidable for cut the body, connecting portion set up in the portion of cutting, and with fixed block looks butt, a spring mechanism sets up on the base for the elasticity butt cuts one side that the fixed block was kept away from to the piece, and actuating mechanism, set up on the base to link mutually with the portion of cutting, actuating mechanism can drive the relative base of the portion of cutting and move, so that the fixed block can is close to or keep away from in the portion of cutting. Above -mentioned cutting device is through a spring mechanism's setting for cut the piece can be all the time through its connecting portion and the fixed block zero clearance of closely laminating, thereby can guarantee effectively that cutting of body is smooth and easy, avoid cutting phenomenons such as the eager tub of incision that obtains is inaccurate, deckle edge appear in incision department and produce, improve the quality that cuts of body greatly.