Disclosed is an ultrasonic scalpel bit, comprising a bit tip (1), a bit bar (2) and a bit body (3), one end of the bit bar (2) being connected to the bit tip (1), and the other end of the bit bar (2) being connected to the bit body (3), wherein a main body of the bit tip (1) is of a flat sheet structure, an upper and a lower face of which respectively form an upper bit ridge (11) and a lower bit ridge (12) of the bit tip (1)； a protrusion (14) is formed at a front end of the upper bit ridge (11)； the upper bit ridge (11) has a thickness greater than that of the flat sheet structure and that of the lower bit ridge (12)； and the protrusion (14) is smooth and free of edges.
