Magnesium composite air pipe

The utility model provides a magnesium composite air pipe, which belongs to the technical field of air pipes, and comprises a magnesium composite plate, an insertion strip shaped like a Chinese character'jin 'and a connecting flange, the magnesium composite plates are connected through the insertion strips shaped like the Chinese character'jin 'to form a rectangular pipeline; the connecting flanges are connected to the two ends of the pipeline and are flush with the ends, and protrusions are arranged on the outer walls of the insertion strips shaped like the Chinese character'jin '. The protrusion abuts against the connecting flange so that the connecting flange can be flush with the end face of the pipeline. Compared with a glass magnesium air pipe, the magnesium composite air pipe provided by the utility model has the advantages of no moisture regain, no halogenation, no toxicity, no odor, no combustion and no explosion, heat preservation, heat insulation, convenience in construction and good secondary proc