The invention discloses a guide ring piece for a three-dimensional drag chain. The guide ring piece comprises a ring piece body, the ring piece body is an arc piece, and a plurality of ring piece bodies form an annular closed cable containing space along the outer side of the circumference of a drag chain link. The two ends of the ring piece body are provided with a hook used for being connected with an inner cross beam of the drag chain link and a branch part matched with the adjacent ring piece body. Through the ingenious structural design of a guide ring, all parts are cooperatively used sothat the guide ring can be conveniently detached, installed and used, the guide ring can form the closed and stable annular cable containing space, and the phenomenon that a cable is prone to being exposed is effectively avoided. The guide ring piece is simple in structure and good in use performance.