The invention discloses an aluminum paste tank self-cleaning device. The aluminum paste tank self-cleaning device comprises a material tank, a feed pipe, a fire retardant cover, an ultrasonic liquid level meter, an annular oil spraying pipe, a discharge pipe, a gear pump, an electromagnetic valve and a controller, wherein the feed pipe, the fire retardant cover, the ultrasonic liquid level meter, the annular oil spraying pipe and the discharge pipe are arranged on the material tank, and the gear pump, the electromagnetic valve and the controller are arranged outside the material tank. The controller is electrically connected with the ultrasonic liquid level meter, the gear pump and the electromagnetic valve, receives detection information of the ultrasonic liquid level meter, and controls opening and closing of the electromagnetic valve and the working state of the gear pump. The feed pipe is arranged on one side face of the top portion of the material tank. The fire retardant cover and the ultrasonic liquid level meter are arranged at the top end of the material tank. The annular oil spraying pipe is arranged at the upper portion of the material tank and located below the feed pipe. The discharge pipe is arranged at the bottom of the material tank. The aluminum paste tank self-cleaning device is simple in structure and convenient to install, the controller automatically controls the cleaning process according to the production requirements, labor is saved, production efficiency is improved, the processing effect is ideal due to the fact that cleaning is timely conducted, and the safety coefficient is high due to the fact that the fire retardant cover and the anti-explosion gear pump are used.