Supporting tool for heat exchange unit inner cylinder assemblies of high-temperature gas cooled reactors and preparing method

The invention discloses a supporting tool for heat exchange unit inner cylinder assemblies of high-temperature gas cooled reactors and a preparing method. The supporting tool is arranged on a machine tool tabletop and comprises multiple supporting block bodies, and positioning grooves are formed in the lower surfaces of the multiple supporting block bodies and are used for being connected to the machine tool tabletop in a clamping manner. A V-shaped groove is formed in the upper surface of each supporting block body, and the bottoms of the V-shaped grooves are planes and are used for containing the inner cylinder assemblies. The tops of the two ends of the V-shaped grooves are of step structures, and the step structures comprise tabletops located at the upper portion and tabletops located at the lower portion. A positioning key is connected to one side face of each supporting block body, and pressing grooves are formed in the two ends of each supporting block body. By means of the supporting tool for the heat