Tool for installing precise equipment and construction method of tool

The invention discloses a tool for installing precise equipment. The tool comprises a foundation and a sizing block, a groove is formed in the upper surface of the foundation, a rectangular supporting frame is fixedly arranged in the groove, and supporting rods are vertically and fixedly connected with the four corners of the supporting frame respectively; an adjusting assembly which can move up and down along the corresponding supporting rod and is fixed is arranged on the supporting rod; the four corners of the sizing block are fixedly connected with the adjusting assemblies respectively, and the sizing block is adjusted to be horizontal through the adjusting assemblies; a pouring formwork is arranged around the periphery of the groove in the upper surface of the foundation, and the interior area defined by the pouring formwork is filled with non-contractile slurry in a grouting mode. By means of the tool, high-precision fine adjustment can be carried out on the sizing block, elevation errors and the leveln