Circulating filtering device for cutting fluid of machine tool spindle

The utility model discloses a machine tool spindle cutting fluid circulating filtering device, which relates to the technical field of cutting fluid use and comprises a storage box and a treatment box, a material passing pipe is fixed on one side of the bottom of the storage box through bolts, one end of the material passing pipe is communicated with the bottom of the storage box, and the other end of the material passing pipe is communicated with one side of the top of the treatment box. A material passing valve is mounted on the material passing pipe; the whole first cylinder and the whole second cylinder are driven by the motor to rotate in the treatment box, so that the scraping plate on the whole second cylinder can continuously scrape and clean the inner wall of the cylindrical screen drum, and the situation that metal impurities block meshes of the cylindrical screen drum and influence subsequent filtering of cutting fluid of a machine tool spindle is avoided; and meanwhile, in order to achieve a bette