Welding clamp of mini-truck longitudinal beam assembly

The invention discloses a welding clamp of a mini-truck longitudinal beam assembly. The welding clamp comprises an installation plate of a strip-shaped plate structure, a plurality of groups of clamping heads fixed to the installation plate and used for fixing and positioning a longitudinal beam and a connector of the longitudinal beam, and a supporting seat, and the installation plate is rotationally connected to the supporting seat with the length direction of the installation plate as the axis direction. A rotary limiting structure has the advantages of being simple and reasonable in structure and bringing convenience to rotation operation, and can accurately and rapidly limit the installation plate rotating in place.