Adjustable anti-deformation tool used during welding and tapping of heat exchanger cylinder

The invention provides an adjustable anti-deformation tool used during welding and trepanning of a heat exchanger barrel, and relates to the technical field of anti-deformation tools, the adjustable anti-deformation tool comprises two main body splicing blocks, a placement groove is formed in the middle of each main body splicing block in a penetrating mode, and a supporting main rod is fixedly arranged in the middle of each placement groove; wherein supporting assemblies used for supporting a tool are installed on the two sides of one supporting main rod, a plurality of pressure diffusion plates are fixedly arranged between the two main body splicing blocks, and a jack is fixedly installed between every two adjacent pressure diffusion plates. The size can be adjusted, the tool can be taken out after barrel welding and tapping work is completed, products with the same barrel diameter can be repeatedly used, and universality is achieved; the two main body splicing blocks are used in cooperation with the jack,