High-durability low-alkali cement and preparation method thereof

The invention discloses high-durability low-alkali cement and a preparation method thereof, and relates to the technical field of cement manufacturing. The high-durability low-alkali cement comprises the following raw materials in parts by weight: 75-90 parts of low-alkali cement clinker, 5-15 parts of desulfurized gypsum and 15-30 parts of modified superfine slag powder. Aiming at the defect that the alkalinity of a cement system is greatly improved due to the fact that slag is directly treated by an alkali activator in the prior art, the treatment method of the slag is optimized, the relatively low alkali content, long-term durability and crack resistance of the whole cement are ensured, meanwhile, the strength of the low-alkali cement is well improved, and the low-alkali cement has a very good application prospect. The cement grinding process is further optimized, the grinding strips with the radiuses gradually reduced from top to bottom are adopted, in the grinding process, the grinding space is gradually