The invention discloses a floating joint. The floating joint comprises a joint main body, a base, a positioning hole, guide grooves, a slide rail, screw holes and a locking hole, wherein the base is positioned in the middle of the joint main body; the guide grooves are formed in a pair of symmetrical surfaces of the base; the screw holes are formed in the other pair of symmetrical surfaces of the base; a section of slide rail is arranged in the middle inside the base; one end of the side surface of the base is provided with the locking hole; and threads are arranged inside the locking hole. The floating joint is simple in structure, reasonable in design and convenient to mount and disassemble, and has enough strength and good manufacturability.