A bit of a piezosurgery comprises a cutting portion (1) located on the front end of the bit of the piezosurgery, and a connection portion (2) located on the rear end of the bit of the piezosurgery and connected to the cutting portion (1). A grinding head (3) used for grinding and cutting and a blade (4) used for cutting are disposed on the front end of the cutting portion (1), and the grinding head (3) and the blade (4) are of an integrated structure. The grinding head (3) and the blade (4) of the bit of the piezosurgery are of an integrated structure, and accordingly in an operation, one piezosurgery can provide multiple functions when a medical staff uses the bit of the piezosurgery, without the need of repeatedly replacing the bit, thereby reducing the operation time, greatly improving the operation efficiency, reducing operative risks, and reducing pains of a patient. In addition, by integrating two kinds of bits having different applications, production costs can also reduced, and manpower and physical material resources are saved. The bit of the piezosurgery is convenient and comfort to operate and has high safety.
