Cold-rolled strip steel surface polishing treatment device and method

The invention discloses a cold-rolled strip steel surface polishing treatment device which comprises a box body and further comprises a transmission module, a scraping module, a guiding device and a collecting device. The transmission module comprises a supporting roller rotationally connected to the inner wall of the box body, two polishing rollers rotationally connected to the inner wall of the box body and a winding roller rotationally connected to the inner wall of the box body. The scraping module comprises a storage groove formed in the surface of the grinding roller, a cam fixedly connected to the surface of the grinding roller, a limiting plate fixedly connected to the inner wall of the box body, a moving rod slidably connected to the surface of the limiting plate, a telescopic plate rotationally connected to the bottom end of the moving rod, and a rubber plate fixedly connected to the bottom of the telescopic plate. The scraping block is fixedly connected to the left side of the rubber plate; the met