The invention discloses a smoke box cleaning device and method. After residual tobacco shreds in a smoke box are removed with a scraper blade and a nozzle, multiple tobacco shred blocks adhering to the smoke box can be thoroughly removed with a brush. The smoke box cleaning device and method are suitable for smoke box inner containers of different materials as well as cleaning of the smoke box inner containers in different application environments, high in applicability and thorough in cleaning, and can improve the utilization rate of tobacco shreds and relieve the labor intensity.