Bit balling preventive PDC (Polycrystalline Diamond Compact) drill bit

The invention discloses a bit balling preventive PDC (Polycrystalline Diamond Compact) drill bit which mainly includes a drill bit body, a PDC compact and a drill bit body surface protrusion. The surface protrusion of the drill bit can reduce adhesion of rock debris on blade surfaces; when rock debris adheres to drill bit surfaces, gaps exist between the rock debris and the drill bit surface due to the surface protrusion, so drilling fluid can enter the gaps, further the rock debris can be washed away from the drill bit surface by mud easily, and the effect of preventing bit balling of the drill bit can be achieved.