Pneumatic metal machining positioner

The utility model relates to the technical field of positioners, in particular to a pneumatic metal processing positioner, which is characterized in that a sliding groove is formed in the top of a workbench, a first sliding rod is fixedly connected to the inner wall of the sliding groove, a sliding block is slidably connected to the surface of the first sliding rod, and a mounting shell is fixedly connected to the top of the sliding block; an adjusting assembly used for adjusting the position of the machined part is arranged in the mounting shell and comprises a second sliding rod, a limiting hole, a first limiting rod and an extending block, the surface of the first limiting rod is connected with the inner wall of the limiting hole in an inserted mode, and a rotating rod is rotationally connected into the extending block; a worker moves a second sliding rod up and down to slide to a designated position in a mounting shell, and then inserts a first limiting rod into the inner wall of a limiting hole, so that