PDC (Polycrystalline Diamond Compact) bit with vibration reduction and centering functions

The utility model discloses a PDC (Polycrystalline Diamond Compact) bit with the vibration reduction and centering functions. The PDC bit comprises a bit body, wherein a plurality of blades are arranged on the bit body; a plurality of main cutting teeth are arranged on each blade; a plurality of R teeth are arranged on each blade, and are arranged between the main cutting teeth on every two adjacent blades; each R tooth and each main cutting tooth arranged close to the R tooth and positioned on one blade where the R tooth is positioned are arranged on the same circular motion track, the central line of each R tooth and the bit surface at an insertion hole in one blade corresponding to the R tooth form a caster angle ranging from 15 degrees to 25 degrees, and the top face of the R tooth faces the main cutting tooth; a centering awl is arranged at the center of the top end of the bit body; the central line of the centering awl is overlapped with that of the bit body; the centering awl is arranged at the center