Heat insulation building material

The invention relates to a heat insulation building material which comprises the following raw materials by mass percent: 20-40% of fine sand, 30-50% of cementing material, 10-40% of heat insulation material, 10-30% of mineral admixture and 5-10% of other auxiliary materials. A production technology of the heat insulation building material comprises the steps of mixing and stirring a shell cementing material, producing foam concrete, cutting and fixing the foam concrete and a heat insulation core body of a polystyrene foam plastic board, pouring, vibrating and molding shell slurry, and maintaining building blocks. The heat insulation building material can be used for replacing a great deal of solid clay bricks, thus saving a great deal of energy and land for China, being capable of consuming a great deal of industrial solid wastes and being beneficial to the environmental protection. The produced construction product has the excellent characteristics of being good in heat insulation property, light in self we