Circular tube joint connecting structure

The utility model discloses a circular tube joint connecting structure which comprises a pipe fitting I and a pipe fitting II, wherein the pipe fitting I and the pipe fitting II are to be connected. A lug plate I is formed on the outer side wall of the pipe fitting I, a lug plate II is formed at the position, corresponding to the lug plate I, of the outer side wall of the pipe fitting II, and a connecting plate is fixed between the lug plate I and the lug plate II and used for fixing the pipe fitting I and the pipe fitting II into an integrated structure. The circular tube joint connecting structure has the advantages that the lug plates are formed on the outer side walls of the pipe fittings, the connecting plate is fixed between the lug plates and used for fixing the pipe fittings to be connected into the integrated structure, and therefore, in the mounting process, the connecting plate and the lug plates are fixed through bolts and then are subjected to welding, and compared with original connecting structures, the structure is stable, welding is convenient, and work efficiency is high.