The invention discloses an automatic closed dough stirring device. The automatic closed dough stirring device comprises a machine frame, wherein an outer cylinder is arranged on the machine frame; thetop end of the outer cylinder is an open end; a corresponding sealing cover is arranged at the upper part of the top end; a motor is arranged at the bottom of the interior of the outer cylinder; an inner cylinder is mounted on a rotating shaft of the motor; the inner cylinder rotates in the clockwise direction through the rotating shaft; a top open end of the inner cylinder is flush with the topend of the outer cylinder; a water injection hole is formed in the lateral part of the inner cylinder; the water injection hole is connected with a water injection pipe in an abutted manner in the outer cylinder; a sealing ring is arranged in the outer cylinder; the sealing ring is closely attached to the outside of the inner cylinder with the water injection hole; the water injection pipe is inserted in the sealing ring; a plurality of leak holes are formed in the wall of the inner cylinder; water pipes are respectively arranged on both sides of the inner cylinder in the outer cylinder; and aplurality of high-pressure spray nozzles are arranged at the end of each of the water pipes. According to the automatic closed dough stirring device disclosed by the invention, the spray nozzles capable of performing high-pressure spraying are added in the outer cylinder with a good sealing property, so that dough can absorb water more thoroughly in the stirring process, and the finally formed dough is more uniform.