The utility model discloses a select coal plant to customize production blending automatic control system, including three feeders, three converters, rubber belt conveyor under the storehouse, three electronic belt conveyor scale, PLC control substation, monitoring host and washing system, the converter meets with the feeder respectively, three frequency converters, three electronic belt conveyor scale are located the below that three every coals of feeder flow the direction respectively, washing system configuration rubber belt conveyor's under the storehouse the income coal dressing side of flowing down, PLC control substation and monitoring host meet, PLC control substation and converter, rubber belt conveyor under the storehouse, the electronic belt conveyor scale homogeneous phase connects and according to the monitoring host's that receives control command control converter, rubber belt conveyor and electronic belt conveyor scale's operation under the storehouse. The utility model discloses can preset the proportion ratio to three kinds of different raw coal, overcome the people and realized defect diversified and accurateization for the blending is unable, lighten intensity of labour, improve the benefit of product quality and enterprise.