Cross connection joint

The invention relates to a cross connection joint and belongs to the technical field of connecting pieces in beam or pipe structures. The cross connection joint comprises an upper clamping block (2) and a lower clamping block (3); an upper clamping part (12) and a lower clamping part (13) are correspondingly arranged in the middles of the upper clamping block (2) and the lower clamping block (3); at least one insertion part (8) is correspondingly arranged on each of the two sides of each of the two clamping parts; the two clamping blocks are mutually spliced; a shaft formed by splicing the insertion parts of the two clamping blocks is matched with pipe orifices at the end parts of a left side connecting piece and a right side connecting piece respectively; the two clamping parts (12) are mutually spliced to form a hole matched with the external surface of a vertical connecting piece (1); an axis of the hole is perpendicular to or intersected with an axis of the shaft formed by the spliced insertion parts (8);