Novel side bearing abrasive disk

The invention discloses a novel side bearing abrasive disk. The novel side bearing abrasive disk is characterized by comprising an upper abrasive disk body and a lower abrasive disk body; the upper abrasive disk body is of a platy structure; a first through hole is formed in the midpoint of the upper abrasive disk body; downwards protruding first protruding umbilicuses are arranged on the vertical side surfaces of the upper abrasive disk body; the vertical section of the first through hole is of a trapezoidal structure of which the lower bottom is larger than the upper bottom; and the lower abrasive disk body is composed of two symmetrically-arranged lower grinding jointed boards. The upper abrasive disk body and the lower abrasive disk body are arranged and connected through the first through hole and a boss; during actual use, the upper abrasive disk body and the lower abrasive disk body are connected with each other through a connecting pair penetrating through a second through hole; and when acting force