The invention discloses a combined joint which comprises a screwing-in section and a hinge section. The screwing-in section is connected with a pipeline through a spherical pipe joint and an outer sleeve nut. An end opening of the screwing-in section is in an indent cone shape. The indent cone shape is used for being matched with the spherical pipe joint. The screwing-in section is provided with a first external thread used for being connected with the outer sleeve nut in a threaded mode. Protruding ridges are arranged on the portion, connected with the screwing-in section, of the hinge section. Radial holes are formed in the middle of the hinge section. The middle of the hinge section is used for being hinged to a hinge type pipe joint body. The end of the hinge section is provided with a second external thread. The second external thread and the protruding ridges are used for fastening the hinge type pipe joint body. The combined joint is multifunctional.