A cylinder mixing machine scraper comprises a conveying belt of which one end extends into a cylinder mixing machine. The cylinder mixing machine scraper is characterized in that the conveying belt extends into a frame, where a scraper plate is positioned, of the cylinder mixing machine; the edge of the top of the scraper plate is a scraper point; a gap is reserved between the scraper point and the inner wall of the cylinder mixing machine; the scraper plate is vertically arranged; the scraper point is positioned at the receiving point in the cylinder. The cylinder mixing machine scraper has the advantages that after the cylinder mixing machine begins to operate, a mixture which is adhered to the inner wall of the cylinder for a certain thickness touches the head of the scraper plate, thus, the mixture is automatically scraped, consequently, adhered material at the position is eliminated, and material leakage phenomena is avoided.