The invention discloses a uniform ventilation device for a cold rice barn. The uniform ventilation device comprises the cold rice barn with a big-end-up cross section, the upper end of the cold rice barn is provided with a feeding port, and the lower end of the cold rice barn is provided with a discharging port. At least one ventilation passages for cooling rice stored in the cold rice barn is transversely and penetratingly arranged at one end, close to the discharging port, of the cold rice barn, and two ends of each ventilation passage are open. The uniform ventilation device for the cold rice barn has advantages that a rice cooling period is shortened, rice processing efficiency is improved, uniform rice cooling is realized, and great convenience in rice processing is achieved.