The invention discloses an ultrasonic bone knife head. The ultrasonic bone knife head comprises a cutting part located at the front end of the ultrasonic bone knife head, a knife tail connected with a transducer, and a knife rod for connecting the cutting part and the knife tail, the cutting part is in the shape of a long cylinder, the end of the cutting part is folded, and side surfaces of the cylinder are provided with a plurality of spiral-shaped blades. During operation by using the ultrasonic bone knife head, the knife head does not rotate so that the body tissue can be prevented from dangers such as rolling, twisting, traction etc. According to the ultrasonic bone knife head, the positioning is accurate, phenomena of slip and deviation on the bone surface can be prevented, the cutting process is smooth, and the controllability is high. The ultrasonic bone knife head can be used for grinding, drilling, scraping, trimming, and the like. The ultrasonic bone knife head has the drilling function and the grinding function in an integrated manner, thereby realizing multiple purposes of one knife, saving the operation time and reducing the fatigue of surgeons.