The invention relates to a ceramsite concrete sound insulation, heat insulation and self-insulation hexagonal brick. Both sides of the brick are hexagonal, and the middle is circular. As shown in Figure 1, the size of the brick is 300*300*220. The brick is mainly prepared from the raw materials of sludge, construction waste, fly ash, stone powder and concrete by molding, and has the advantages ofeffectively reducing the self-weights of buildings, lowering the labor intensity of construction, lowering the cost of walls, enhancing the integrity of wall structures and improving the thermal performance of the walls. The brick completely eliminates the cold bridges of the walls, and maximizes the heat preservation, sound insulation and heat insulation effects of the brick. The brick has the advantages of a reasonable and simple structure, low cost, high construction speed, high efficiency, and strong comprehensive functions of heat preservation, heat preservation, sound insulation, sound absorption, waterproofness.