The utility model discloses a crossing circle pipe truss's in space passes through node structure mutually, including main tributary stay tube and auxiliary stay pipe, the outer wall of main tributarystay tube is through a pair of main semicircle cardboard chucking, and the outside of auxiliary stay pipe is through a pair of supplementary semicircle cardboard chucking, the equal integrated into one piece in the outside of main semicircle cardboard and supplementary semicircle cardboard has the connecting plate, and connects through the connecting screw between the connecting plate, the terminal integrated into one piece of supplementary semicircle cardboard has the linking arm, the utility model discloses the device not only can be applicable to through convenient angular adjustment and reinforce with different inclination welded pipe nodes, carries on also can utilizing the device to connect in addition between the welded pipe to not being convenient for to realize that the non - welding between the two root circles pipe is fixed fast, and can strengthen main tributary stay tube and the local stiffness of auxiliary stay pipe, consequently have very high practical value.