Impregnated PDC drill bit

The utility model discloses an impregnated PDC (Polycrystalline Diamond Compact) drill bit. The drill bit comprises a drill bit body and blades, fan-shaped impregnated blocks are arranged on the surfaces of the blades; each fan-shaped impregnated block comprises a tooth column and a wedge-shaped tooth crown; the wedge-shaped tooth crown is composed of an arc-shaped crown base with the center protruding and two symmetrically-arranged wedge faces. Wherein the two wedge surfaces are formed by inwards inclining and extending two sides of the lower part of the crown base to the tooth top surface tobe intersected, and is characterized in that the tooth column and the wedge-shaped tooth crown are of a fan-shaped annular structure formed by rotating the longitudinal section curve of the tooth column and the wedge-shaped tooth crown around a central shaft at a certain turning radius and a certain turning angle. According to the utility model, the convex arc crown base is arranged at the top ofthe impregnated block; th