The utility model relates to a high-temperature cracking scale removing apparatus for a pipe bundle of a large shell-and-pipe heat exchanger. The utility model discloses the apparatus which is provided with a thermal insulation shell body, wherein the inner wall of which is fixed with a heating apparatus and a temperature difference monitoring apparatus, and a uniform regulation apparatus for space temperature distribution and a carrying apparatus of a heat-exchange apparatus pipe bundle are arranged in the shell body. The utility model can effectively carbonize and clean viscous and rigid hydrocarbon scale formation objects in the pipe bundle of a large shell-and-pipe heat-exchange apparatus, and the apparatus safety is guaranteed simultaneously.