The invention discloses a light ceramic brick which is manufactured by high temperature burning and has the interior structure of quasi-honeycomb close air holes. The invention also discloses the preparation method of the light ceramic brick, which processed the prior polished waste material of vitrified brick under batch production by the ceramic industry for wet ball milling, sieving, removing iron, powder spraying by a spray drying tower, molding by dry pressing molding method or kneading for extrusion molding by wet method and burning to produce the product by a continuous type kiln furnace or an interim type kiln furnace. A ceramic brick with quite light weight is manufactured. Aiming at the former disadvantage that the water material is not used completely, the industrial waste slagis used more effectively at a large quantity; because of the structure of light weight of the product, the product can be applied to the decoration of the wall surface of high-rise building and has the good performances of light weight, high intensity, heat preservation, sound absorption etc., and the weight borne by a wall body is lightened obviously; at the same time the product also has the characteristics of being convenient for transportation, being easy for construction, quick speed etc.; the product has quite outstanding advantages at the aspects of saving energy, reducing the self weight of the building etc. and belongs to an environmental protective type building ceramic decoration material.