The large concrete mixing plant is optimized and improved on the basis of home and aboard mixing plant. With material storing, weighing, mixing together, the plant can mix different kinds of concrete, especial the dry and hard concrete. It is good equipment for large & middle construction engineering, hydropower, highway, port, yard, bridge, airport, and prefabricate concrete products factory. 1. Sealed mixing and conveying system, with dust filter, so that reduce the dust and protect environment. 2. Modularization structure design, makes the installation and disassemble more easy, and the operation more trustable. 3. Plc procedure and automatic control, computer tracked, easy to maintain.