Platform and method for testing static rigidity of machine tool spindle

The invention discloses a platform and a method for testing static rigidity of a machine tool spindle, and belongs to the technical field of measurement. The platform comprises a processing work-piece and a tool post for processing the work-piece, wherein the tool post is provided with a loading device for loading the work-piece, a force sensor for measuring the loading force is arranged between the loading device and the work-piece, and a plurality of displacement measurement devices for collecting deflection of the spindle are arranged on the work-piece and the tool post. According to the platform, a force signal generated by the loading device is collected by the force sensor; the displacement measurement devices collect the deflection generated by the spindle, synchronously collect the force signal and a deformation signal; and not only can a static rigidity curve of the spindle be automatically drawn, but also the platform is convenient to install, high in precision and good in reliability. In addition, the platform also has good expandability, and is suitable for testing the static rigidity of a horizontal turning center, a processing center and a portal machine tool spindle.