Concrete hollow blocks are suitable for a variety of constructing houses in areas with aseismic design of 8 degrees and below, including high-rise and long-span buildings, and can also be used in municipal facilities such as walls, retaining walls, bridges, and flower beds, with a wide range of applications. Itis light weight, insulate, seismic, uniform size and shape, high construction efficiency. Not only can it be used for non-load- bearingwalls but blocks of higher strengthcan also be used for load-bearing walls of mid-rise buildings. By function It is divided into ordinary blocks, decorative blocks, insulation blocks, sound-absorbing blocks and other types. By structural It is divided into blind bottom blocks, bottom open blocks, and slotted blocks. By hollow shape It is divided into square hole blocks and round hole blocks. By arrangement of hollow It is divided into single-row, double-row, and multi-row perforated blocks.