The utility model discloses a retaining ring for cables, including first snap ring body and the second snap ring body that the diameter equals, the both ends of first snap ring body and second snap ring body are equallyd divide do not to be equipped with and are connected the endotheca and connect the overcoat, the inner wall of first snap ring body and second snap ring body all is equipped with the dentate bulging of slope, and this internal dentate bulging's of two snap rings slope opposite direction, the both ends of two snap ring body inner walls all are equipped with a supporting bench, two snap ring bodies all are equipped with axial opening, and the opening both ends all are equipped with the connection boss, are equipped with the connecting hole on the connection boss. The beneficial effect of the utility model: during two snap ring body independent utilities, can carry on one -way fixedly to cable or cable joint, when the cooperation was used, two snap ring bodies were through connecting the endotheca and connect overcoat fixed connection, because this internal dentate bulging opposite direction of two snap rings, can connect fixedly to two sections cables, and the firm degree of connecting is high.