A mechanical device used to separate impurities or divide straw into different sizes as needed. Rotary sieve: separates fine powder components from straw, separates medium-sized wood particles, and removes wooden impurities.

Electric motor: drives the sieve and generates the vibration and rotation necessary for screening. Metal frame: supports all components. Feeding system: where straw is fed into the machine. Output system: separates the output into multiple types by size or purity. Shaking system: prevents clumping and increases productivity. Sealed closure to prevent dust spread. Main functions: purifying straw from dust and dirt, classifying materials into different grades, preparing straw for use in animal feed or other industries with the highest specifications and free from impurities.