The utility model relates to a vertical safety of iron tower climbing prevents weighing down line for training, including backup pad, buffer, steel strand wires, UT molded lines clamp and triangle -shaped hasp, the backup pad is perpendicular with the iron tower tower leg, and fixed mounting, and wherein buffer is fixed to the upper support plate other end, lower part backup pad other end fixing steel strands, and steel strand wires set up with iron tower tower leg level, use the utility model discloses the operator just can the climbing in -process frequently two safety ropes of alternate useprotect, thereby loaded down with trivial details operating procedure has been saved, the triangle -shaped hasp has been increased, make the hasp cup joint the department of U type portion at UT molded lines clamp, steel strand wires press from both sides with the UT molded lines respectively and the hasp is fixed, make the UT molded lines press from both sides firm installation, avoid because operator misstep, it rocks to make steel strand wires produce, when falling in the twinkling of an eye because of misoperation takes place misstep, fast poor auto -lock ware will play a role, firmly fixthe operator in the normal position, real standard personnel's safety has been guaranteed, training efficiency has been promoted.