Crushing device for preparing nanometer materials

The crushing device comprises a processing tower, a crushing box is fixedly connected to the upper portion of the inner wall of the processing tower, a filter screen is embedded in the bottom of the crushing box, and two connecting shafts are rotationally connected between the two sides of the inner wall of the crushing box; and crushing blades are uniformly and fixedly connected to the surfaces of the two connecting shafts from left to right, and one ends of the two connecting shafts sequentially penetrate through the crushing box and the processing tower and extend to the exterior of the processing tower. The two first grinding rollers are used for primary grinding, particles are finer after materials are ground, meanwhile, powder attached to the surfaces of the first grinding rollers can be scraped and fall off by the two first scrapers, and raw materials are ground after being smashed, so that the particles of the raw materials are processed to be finer and more smooth. Therefore, the production and proce