The invention provides a
refrigeration and freezing device and a compartment division component thereof. The compartment division component comprises a division plate for dividing a storage compartment; a first
tuyere and second tuyeres are formed in the front part and the rear part of the division plate respectively; a manual
air door is arranged at the division plate, and is used for manually adjusting an open area of the first
tuyere; an electric
air door is arranged at the division plate and is controlled to adjust open areas of the second tuyeres; a controller, after receiving adjustment information of the manual
air door, controls the electric air door to carry out adjustment synchronously, so as to allow the open area of the first
tuyere and the open areas of the second tuyeres to be increased or reduced synchronously. The
refrigeration and freezing device comprises the storage compartment and the compartment division component; the compartment division component is arranged in the storage compartment for dividing the storage compartment into a first sub-compartment part and a second sub-compartment part. The
refrigeration and freezing device can allow
cold air to enter the second sub-compartment part via the second tuyeres, after the
cold air and a storage
object exchange heat, the
cold air flows into the first sub-compartment part via the first tuyere, and the
refrigeration temperature of the second sub-compartment part is adjusted by changing the open area of the first tuyere and the open areas of the second tuyeres.