Round hole beveling drill bit and method

The invention provides a round hole beveling drill bit and method. The round hole beveling drill bit comprises a drill bit body, a tool edge, a drill rod and a drill handle. The tail end of the drill bit is connected with a drill rod, the tail end of the drill rod is connected with a drill handle, and the knife edge is arranged at the tail end of the drill bit and close to one end of the drill rod. The drill rod penetrates through the round hole formed in the plate in advance, the blade portion of the knife edge makes contact with the round hole, the drill handle is installed on drilling equipment, the equipment is started to achieve plate round hole reverse side groove machining, and drilling equipment does not need to be erected on the reverse side of the plate; and the working efficiency is improved, meanwhile, the problem of reverse side groove machining of the plate in a narrow space can be solved, reverse side groove machining can be directly completed, and the working difficulty is reduced. Meanwhile,