Planer type milling machine workpiece positioning device for lathe bed machining

The utility model relates to the technical field of planer type milling machine workpiece positioning devices, in particular to a planer type milling machine workpiece positioning device for lathe bed machining, which comprises a fixed base, a positioning component and a transmission component, two guide rails are arranged at the upper end of the fixed base, and the positioning component is slidably connected with the guide rails. The transmission assembly comprises a driving assembly, a braking assembly and a transmission rod, the transmission rod is in an L shape, the upper end of the transmission rod is fixedly connected with the positioning assembly, the horizontal section of the transmission rod is connected with the driving assembly in a matched mode, and the braking assembly is arranged on the lower side of the transmission assembly. Positioning blocks of different shapes can be installed on a positioning plate of the positioning assembly, positioning grooves of different shapes are formed in the diffe