Clay center brick can be used for building maintenance structure, masonry column, arch, chimney, kiln body, ditch and foundation, etc. It can be used with lightweight aggregate concrete, aerated concrete, rock wool and other heat insulation materials to build a lightweight wall with two sides of brick and the middle filled with lightweight materials. Appropriate reinforcement or steel mesh can be arranged in the masonry to form reinforced masonry body, instead of reinforced concrete columns, beams, etc.