Multi-section spliced steel structure cross beam easy to disassemble and assemble

The utility model discloses a multi-section spliced steel structure cross beam easy to disassemble and assemble, which relates to the technical field of steel structure splicing and comprises a first I-beam and a second I-beam which are attached end to end, and a first frame assembly and a second frame assembly are symmetrically arranged outside the connecting ends of the first I-beam and the second I-beam. The tops and the bottoms of the first frame assembly and the second frame assembly are jointly connected with reinforcing assemblies, and fixing assemblies are arranged outside the first frame assembly and the second frame assembly. The first frame assembly and the second frame assembly can be fixed outside the connecting ends of the first I-shaped steel and the second I-shaped steel through the two groups of reinforcing assemblies to complete primary fixation; and then two sets of fixing assemblies are matched with the first frame assembly and the second frame assembly, so that one side of the connecting