Clamp tool for coupler assembling and machining

The utility model relates to the technical field of coupler assembling, in particular to a clamp tool for coupler assembling and machining. According to the technical scheme, the device comprises a rack and a second L-shaped positioning plate, a rail is fixed to the top end of the rack, sliding blocks are slidably installed at the two ends of the rail respectively, first L-shaped positioning plates are fixed to the top ends of the two sliding blocks respectively, and hydraulic cylinders are fixed to the upper surfaces of the horizontal ends of the two first L-shaped positioning plates respectively; hydraulic rods are movably mounted at the tops of the two hydraulic cylinders correspondingly, and the top ends of the two hydraulic rods are fixed to the lower surfaces of the horizontal ends of two second L-shaped positioning plates correspondingly. The coupler positioning device has the advantages that the height of the coupler can be adjusted while the coupler is positioned, and the coupler positioning device i