Splicing joint structure of cross-shaped column and box-shaped column

The cross column and box column splicing joint structure is characterized in that the end of a cross column is installed inside the end of a box column and is firmly welded, hollowed-out grooves are cut in two opposite box wall plates of the box column respectively, widened portions are arranged at the positions, corresponding to the hollowed-out grooves, of cross webs, the widened portions of the cross webs extend into the hollowed-out grooves, and the cross webs are connected with the box column through bolts. The widened part of the cross-shaped web plate is welded with the hollow-out groove from the outer side of the box-shaped wall plate; and the other two opposite box-shaped wall plates are welded with the tail ends of the cross-shaped web plates from the inner sides. The cross-shaped column and box-shaped column splicing node structure has the beneficial effects that the tail end of the cross-shaped web plate in the cross-shaped column and box-shaped column splicing node structure is widened, and inter