This product is a one-component cement-based anti-crack rendering material specifically designed for external wall external insulation systems. It is scientifically formulated by blending high-quality cement, selected quartz sand, polymer modifiers, and various functional additives. The product exhibits excellent anti-cracking performance, high bonding strength, and good flexibility. It can effectively accommodate the deformation of the substrate, prevent cracking on the surface of the insulation layer, and provide a long-lasting and reliable protective finish for external wall external insulation systems.