Metal piece machining device

The invention provides a metal piece machining device, and relates to the technical field of medical instrument machining, the metal piece machining device comprises a mounting limiting piece, two external expansion driving parts are slidably connected to the mounting limiting piece, and the two external expansion driving parts are fixedly connected with operation devices respectively; the mounting limiting piece is fixedly connected with an axis fixing part; the mounting limiting piece is rotationally connected with two upturning bending parts; a forming driving part is mounted at the bottom of the mounting limiting piece; hook folding devices are respectively mounted on the two upturning bending parts; positioning, upward bending and hook bending treatment of the retractor can be achieved at a time, and meanwhile machining consistency of the two parts is guaranteed. The problems that an existing metal part machining device is not provided with a bent section double-side positioning structure, the bending pr