Abstract: Disclosed is a control method for air deflectors of an air conditioner. The air deflectors are arranged at an air outlet of the air conditioner to adjust directions of discharged air. The control method comprises: during the air conditioner is operating in a refrigeration mode, judging whether a motion instruction for swinging air is input or not; when the motion instruction for swinging air is not input, acquiring a set air volume level, set temperature T1 and indoor ambient temperature T2; according to the set air volume level, the set temperature T1 and the indoor ambient temperature T2, judging the amount of a refrigeration demand of a user; and according to the amount of the refrigeration demand of the user, controlling an air guide angle of the air deflectors.