Clay clinker and fine powder are used as raw materials, mixed with fine powder additives, and the bulk material made of cement as a binder is used to fill the gap between the furnace throat steel brick and the furnace shell and the secondary pouring layer under the furnace bottom water cooling pipe. It is used for the leveling layer of the bottom of the furnace bottom water-cooled pipe or the internal gap of the steel throat steel brick and the gap between the steel brick and the furnace shell.