The invention mainly relates to electric power fittings and especially relates to an insulating lifting platform for live-line working of a tubular bus-bar in a transformer station. Aiming at disadvantages of inconvenient adjustment and influence on working efficiency of live-line working, the invention provides an insulating lifting platform convenient for usage and capable of increasing working efficiency of live-line working on the tubular bus-bar. A scheme is as below: an insulating lifting platform for live-line working of the tubular bus-bar is characterized by employing a structure of an insulating assembled ladder companied with a pedestal; an insulating lower joint ladder, an insulating middle joint ladder and an insulating upper joint ladder are all comprised of a telescoping ladder edge connected with a square support; the lower joint ladder is jointed with the middle joint ladder; a landing slab is arranged on an upper end of the middle joint ladder; the middle joint ladder is jointed with the upper joint ladder; a folding landing slab is arranged on an upper end of the upper joint ladder; the folding landing slab rotates around the telescoping ladder edge and has a foldable board; two sides of the lower joint ladder are provided with rotating shafts; the rotating shafts are movably connected with a bearing on a pedestal support; and truckles are arranged under the pedestal, and foldable positioning pillars extend from four angles of the pedestal.