The utility model relates to the technical field of pipeline connecting devices, in particular to a universal pipeline connecting device which comprises symmetrically-arranged connecting parts, the connecting parts are arranged between a connecting object and a
connected object, one end of each connecting part is provided with a connecting piece, and each connecting piece is provided with a connecting groove used for being connected with the
connected object. Mounting grooves matched with each other are formed in the ends, close to the connecting object, of the connecting parts, a plurality of mounting holes matched with each other are formed between the two connecting parts, mounting pieces are arranged on the mounting holes of the two connecting parts in a penetrating mode, a plurality of positioning rings are arranged in the mounting grooves of the connecting parts, and the positioning rings are semi-rings protruding out of the inner surfaces of the mounting grooves; connecting convex rings are arranged at the ends, away from each other, of the two connecting pieces, and the connecting holes penetrate through the connecting convex rings. Therefore, on the premise that the connecting strength is guaranteed, the tightness degree between the pipeline and the connecting part is improved, the connecting stability is improved, the connecting
modes are diversified, the application range is wide, and installation is easy and convenient.