Flat-abrasion obstacle-removing drill bit

The utility model discloses a flat abrasion obstacle removing drill bit which comprises a cylindrical drill bit steel body, a cylindrical diamond matrix is fixedly arranged at one end of the drill bit steel body, the diamond matrix and the drill bit steel body are concentrically arranged, a flat abrasion end face is arranged at the front end of the diamond matrix, and at least two main cooling grooves which are evenly distributed in the circumferential direction are formed in the flat abrasion end face. The inner ends of the main cooling grooves cross the center of the flat grinding end face, a plurality of auxiliary cooling grooves are further formed in the positions, located between the main cooling grooves, of the flat grinding end face, the inner ends of the main cooling grooves and the inner ends of the auxiliary cooling grooves penetrate through the diamond matrix to be provided with cooling water inlet holes, and the outer ends of the main cooling grooves and the outer ends of the auxiliary cooling gro