Dust prevention component of automobile hub bearing

The invention relates to a dust prevention component of an automobile hub bearing. The dust prevention component is arranged between an ABS gear ring and a steering knuckle, and comprises a mounting part matched with a driving shaft; the mounting part is cylindrical and flanges extending outwards are formed on the two sides of the mounting part in a surrounding manner; the flange on one end of the mounting part is a dust prevention part matched with the steering knuckle, while the flange on the other end is a positioning part fitted with the step surface of the driving shaft; the fit gap of the dust prevention part and the steering knuckle is not larger than 0.5mm. The dust prevention component of the automobile hub bearing is simple in structure and convenient to manufacture, and can be directly molded by pressing by use of a die; the dust prevention component is ingenious in design; the gap between the ABS gear ring and the steering knuckle is utilized thoroughly, and consequently, impurities such as dust can be prevented from going into the hub bearing and the risk of misreading of wheel speed data due to the accumulation of the dust on the ABS gear ring can be avoided; besides, a zinc coating is formed to prevent rusting and prolong the service life of the dust prevention component.