Granite stone powder concrete having strength grade not more than C40 and preparation method thereof

The invention discloses granite stone powder concrete having strength grade not more than C40 and a preparation method of the granite stone powder concrete. The granite stone powder concrete is mainly prepared from a cementing material, water, sand, gravels and an admixture, wherein the cementing material is a mixture of cement and granite stone powder or a mixture of cement, mineral powder and granite stone powder, and the admixture is a water reducing agent. The granite stone powder concrete has early crack resistance, chloride penetration resistance and carbonation resistance, which are superior to those of the traditional concrete under a condition of meeting the strength requirement.