Precise drilling device for surface of metal material

The utility model relates to the technical field of metal material plate machining, in particular to a metal material surface precise drilling device which comprises a shell, a base is installed at the top end of the outer wall of the shell, a lifting air cylinder is installed on the upper portion of the outer wall of the shell, and curved clamping seats are connected to the two sides of the top end of the outer wall of the base in a sliding mode. According to the metal plate clamping device, a metal plate can be clamped through the two arranged curved clamping seats, the positions of the curved clamping seats can be fixed through the arrangement that the positioning insertion blocks are matched with the insertion frames and the positioning blocks a, and therefore the metal plate can be clamped through the two curved clamping seats, and the metal plate can be clamped through the positioning insertion blocks. And meanwhile, the positions of the curved clamping seat and the metal plate can be adjusted by taking