The invention relates to a draught beer barrel cleaner, and belongs to the field of general cleaning. In the draught beer barrel cleaner, the frame of the mechanical body is provided with a drive shaft and a drive motor, wherein the drive shaft is provided with a cleaning head bracket and a barrel support bracket; the cleaning head bracket is provided with a vacant position and a cleaning head; the cleaning head bracket is driven by a cylinder fixed on the frame; the barrel support bracket is provided with a vacant position and a working position; the working position is fixedly provided with a barrel support; and the barrel support is provided with a fixture. The draught beer barrel cleaner adopts a rotary parallel cleaning mode to greatly improve cleaning efficiency. The rotary draught beer barrel cleaner has the efficiency of 180 to 200 barrels/hour. Compared with the conventional equipment, the draught beer barrel cleaner improves average personal efficiency by 3 to 4 times.