A disposable carving blade contains a central hole defined at a central position thereof, a first central line passing through the central position thereof, a right cutting rim formed on a first peripheral side thereof and a left cutting rim formed on a second peripheral side thereof. The right cutting rim is connected with the left cutting rim to form a V-shaped portion, and the V-shaped portion includes a cutting edge defined on a distal end thereof. An intersection point of the right cutting rim on the first peripheral side of the disposable carving blade and the left cutting rim on the second peripheral side of the disposable carving blade is adjacent to the first central line, and a distance between the intersection point and the first central line is a first eccentric value.