The invention relates to the technical field of housing construction and particularly discloses a composite wall, the composite wall comprises an external wall panel, an internal wall panel and a packing layer arranged between the external wall panel and the internal wall panel, wherein the composition of materials of the external wall panel comprises cements, mine wastes, lignocelluloses, straw powders, water reducing agents, alkali-resistant glass fibers and concrete waterproofer. The external wall panel of the composite wall disclosed by the invention is similar to a steel plate in nature, has a certain tenacity, and is sturdy and durable, water-proof and fire-proof, heat-proof and sound-proof, light in material, environmental-friendly, and convenient in manufacture and construction, therefore, the performances in various aspects of the whole composite wall are effectively improved, and the composite wall is easy to popularize and use.