Positioning device for liner plate machining

The utility model relates to the technical field of liner plate processing, in particular to a positioning device for liner plate processing, which comprises a processing platform, a transverse baffle plate perpendicular to the processing platform is arranged on the upper surface of the processing platform, and a guide piece is arranged on one side, far away from the transverse baffle plate, of the upper surface of the processing platform. A plurality of leakage holes are formed in the position, between the transverse baffle and the guide piece, of the upper surface of the machining platform, a strip-shaped limiting hole is formed in the position, corresponding to the transverse center of the machining platform, of the machining platform, and a guide hole is formed in one side of the guide piece. The strip-shaped limiting hole can pull the positioning extrusion plate, then the positioning extrusion plate can synchronously drive the U-shaped connecting piece, and then the U-shaped connecting piece synchronousl