The invention provides a separable rotating joint which comprises a shell, a rotating shaft and a separating device mounted in the shell. The shell is provided with an inlet and a valve hole, and fluid media enter the shell from the inlet and the valve hole. One end of the valve hole communicates with the inlet, and the other end of the valve hole communicates with a guiding hole. The separating device comprises a slide valve and a static ring, and the slide valve is arranged in the valve hole, is connected with the valve hole in a sealed mode and can move in the axial direction. The static ring and the guiding hole are kept sealed, and the static ring can move in the axial direction. The rotating shaft is inserted into the shell, the rotating shaft and the static ring are coaxially and oppositely mounted and can be attached to be sealed, and the rotating shaft and the static ring can be separated from each other when the static ring moves to the slide valve. When the media are transported, sealing components of the rotating joint can make contact with one another, so that sealing is achieved and the function of the rotating joint is achieved; when no medium is transported by the rotating joint, the sealing components which make contact originally can be separated, dry friction is avoided, the temperature rise is avoided, rapid abrasion caused by dry friction is prevented, and the service life of products is greatly prolonged.