An embodiment of the utility model discloses a cable sliding device. A steel wire rope of a guide rail mechanism penetrates the center of sliding rings of a sliding mechanism to enable fixing modules which are arranged under the sliding rings to slide on the steel wire rope, and accordingly the technical problems such as failure of a bearing running caused by adverse working conditions are solved, maintenance probability is lowered further, and economic and manpower loss is avoided. The cable sliding device comprises the sliding mechanism and the guide rail mechanism. The sliding mechanism consists of the sliding rings and the fixing modules. The fixing modules are arranged under the sliding rings. The guide rail structure is of a steel wire rope structure. By the steel wire rope structure penetrating the centers of the sliding rings, the fixing modules optionally slide on the steel wire rope which is in the strain state through the sliding rings.