First, the basic composition of the concrete mixing plant. Concrete mixing plant mainly by the mixing console, composed of material weighing systems, material handling systems, material storage system and control system and other ancillary facilities. Mixer mixer according to the mixing method is divided into compulsory mixing and from the drop-style mixing. Compulsory mixer is mixing station at home and abroad to use the mainstream, it can stir the mobility, semi-hard and dry hard concrete. Since the fall type mixer stirring fluidity concrete, rarely used in the mixing station. Compulsory mixer planetary mixer structure is divided into the spindle, single horizontal shaft mixer and twin-shaft mixer. And especially the twin-shaft compulsory mixer to use the best performance. The company's series mixing station all the twin-shaft compulsory mixer. Material weighing system material weighing system is a key component of the concrete quality and concrete production costs, mainly divided into three parts of the aggregate weighing, powder weighing and liquid weighing. Under normal circumstances, the mixing station superimposed weighing less than 20 cubic meters per hour, with a scale, cement and fly ash aggregate (sand, stone), with a scale, water and liquid admixtures are weighing then put into the water, said the fighting within the pre-mixed liquid admixture. Mixing station for more than 50 cubic meters per hour, the use of said material independent weighing, all weighed using electronic scales and computer control. Aggregate weighing accuracy ≤ 2%, cement, powder, water and admixtures weighing accuracy ≤ 1% of the material handling system material handling consists of three parts. The aggregate transportation; mixing station conveyor with hopper and belt conveyor in two ways. Hopper to enhance the advantages of small size, simple structure. The belt conveyor transport distance, high efficiency, low failure rate. Belt conveyor is mainly applied in the aggregate to a temporary position of the mixing station, thereby enhancing the productivity of the mixing station. The powder delivery; concrete available in powder, cement, fly ash and slag. Now widely used in powder conveying screw conveyor conveying large mixing using pneumatic conveying and scraper conveyor. The advantages of the screw conveyor is a simple structure, low cost and reliable use. The liquid delivery of water and liquid admixtures, they were delivered by the pump.