Mixing plant and discharge hopper cleaning method

The invention relates to the technical field of mixing plants, and provides a mixing plant and a discharge hopper cleaning method.The mixing plant comprises a mixing main machine, a discharge hopper and a cleaning device; the stirring main machine is used for stirring concrete raw materials; the discharge hopper is used for conveying the stirred concrete finished product to the mixer truck; cleaning water is stored in the cleaning device, and the discharging hopper is cleaned through the cleaning water. The cleaning water after cleaning is discharged into the mixer truck; the stirring water used for stirring the concrete raw materials and the cleaning water form corresponding formula water in each tray of concrete finished product materials. During actual work of the mixing plant, the cleaning device cleans the discharge hopper with cleaning water, and the cleaning water after cleaning is drained into the mixer truck; the stirring water for stirring the concrete raw materials and the cleaning water form the c