The impact block of sand-making machine is forged directly by imported high-quality alloy. Its wear-resistant strength and toughness are in the leading position in China, which greatly improves the work efficiency and the service life of the impact block is 3-mdash longer than that of high-manganese steel. The latest 5X sand-making machine has adopted the diamond-shaped combination impact block. The main feature of this kind of impact block is to use foreign high-quality alloy instead of domestic traditional manganese steel and casting alloy parts, thus greatly improving the abrasion resistance of the impact block and the breaking ability of the sand-making machine. It can also be used alternately, which not only improves the utilization rate of materials, but also effectively protects the life of the inner sheath of the sand machine. The overall service life of the sand making machine is more than five times higher than that of the original product, and the sand making efficiency is increased by more than 30%.