Square tube for container

The utility model discloses a square tube for a container. The square tube comprises a square tube assembly, the square tube assembly comprises a square tube main body and a square tube inner cavity formed in the inner side of the square tube main body; a support assembly; the supporting assembly comprises a threaded rod fixed to the inner top face of an inner cavity of the square pipe, an installation flat plate penetrated by the threaded rod, a nut for locking the installation flat plate, a sliding groove opening formed in the bottom face of the installation flat plate, a sliding block clamped into the inner side of the sliding groove opening and a supporting rod connected to the bottom face of the sliding block. Through mutual matching of the square tube structure and the supporting structure, fine adjustment can be performed on the supporting strength of the whole square tube, fine adjustment supporting can be performed on any position, the supporting strength of the whole square tube is improved, sinking