Tool used for rapid assembly of JW4G frame

The invention discloses a tool used for rapid assembly of a JW4G frame. The tool comprises a main platform, two groups of four-corner height platforms, two middle height platforms, adjusting and pressing devices, four end beam positioning backstops and pin shafts, wherein the four-corner height platforms are arranged at the four corners of the main platform in a pairwise opposite manner; the adjusting and pressing devices comprise portal frames, connecting plates, nuts, vertical screw rods, transverse screw rods and moment arm rods; the two middle height platforms are arranged on the main platform; and the four end beam positioning backstops are respectively arranged on the outer sides of the main platform below the four four-corner height platforms, and are pairwise matched to be used for bearing and positioning two end beams to allow the two end beams to have the verticality. By employing the tool, the positioning of side beams, cross beams and the end beams during the assembly is realized; frame deformation in an assembly welding process is avoided; the effects of the rapid and efficient assembly and time saving are achieved; and the assembly quality is ensured.