High-precision grinding device

The utility model relates to the technical field of polishing devices, and discloses a high-precision polishing device which comprises a bottom plate, a first motor is fixedly installed at the bottom of the bottom plate, the output end of the first motor penetrates to the top of the bottom plate and is fixedly provided with a containing disc, and a sliding groove is formed in the top of the containing disc. The inner side of the sliding groove is rotationally connected with a two-way threaded rod. The high-precision grinding device has the beneficial effects of being convenient to grind and the like, and the problems that an existing flange grinding device is prone to being limited by a fixed clamping device in the using process, consequently, the fixed clamping position cannot be ground, the position of the clamping device for clamping a flange needs to be continuously adjusted, and a grinding disc is likely to be damaged in the grinding process are solved. And due to the fact that protrusions are arranged o