A control method for air deflectors of an air conditioner, wherein, the air deflectors are arranged at an air outlet of the air conditioner and configured to adjust a direction of discharged air, the control method comprises following steps: during the air conditioner is running 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; judging amount of refrigeration demand of a user according to the set air volume level, the set temperature T1 and the indoor ambient temperature T2; controlling an air guide angle of the air deflectors according to the amount of the refrigeration demand of the user; characterized in that: an indoor fan of the air conditioner has options for air volume level, including a super-high air volume level, a high air volume level, a medium air volume level and a low air volume level; and the step of judging amount of refrigeration demand of a user comprises: step a: judging whether the set air volume level is the super-high air volume level or not; step b: if the set air volume level is the super-high air volume level, further judging whether T1 is equal to or greater than T2+t or not, wherein 1°C≤t≤3°C; if T1 is equal to or greater than T2+t, it is judged that the refrigeration demand of the user is large; if T1 is less than T2+t, it is judged that the refrigeration demand of the user is small; if the set air volume level is not the super-high air volume level, jumping to step c; step c: judging whether the set air volume level is the high air volume level or not; step d: if the set air volume level is the high air volume level, further judging whether T1 is equal to or greater than T2+t; if T1 is equal to or greater than T2+t, it is judged that the refrigeration demand of the user is large; if T1 is less than T2+t, it is judged that the refrigeration demand of the user is small; and if the set air volume level is not the high air volume level, it is judged that the refrigeration demand of the user is small. during the air conditioner is running 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; judging amount of refrigeration demand of a user according to the set air volume level, the set temperature T1 and the indoor ambient temperature T2; controlling an air guide angle of the air deflectors according to the amount of the refrigeration demand of the user; characterized in that: an indoor fan of the air conditioner has options for air volume level, including a super-high air volume level, a high air volume level, a medium air volume level and a low air volume level; and the step of judging amount of refrigeration demand of a user comprises: step a: judging whether the set air volume level is the super-high air volume level or not; step b: if the set air volume level is the super-high air volume level, further judging whether T1 is equal to or greater than T2+t or not, wherein 1°C≤t≤3°C; if T1 is equal to or greater than T2+t, it is judged that the refrigeration demand of the user is large; if T1 is less than T2+t, it is judged that the refrigeration demand of the user is small; if the set air volume level is not the super-high air volume level, jumping to step c; step c: judging whether the set air volume level is the high air volume level or not; step d: if the set air volume level is the high air volume level, further judging whether T1 is equal to or greater than T2+t; if T1 is equal to or greater than T2+t, it is judged that the refrigeration demand of the user is large; if T1 is less than T2+t, it is judged that the refrigeration demand of the user is small; and if the set air volume level is not the high air volume level, it is judged that the refrigeration demand of the user is small. step a: judging whether the set air volume level is the super-high air volume level or not; step b: if the set air volume level is the super-high air volume level, further judging whether T1 is equal to or greater than T2+t or not, wherein 1°C≤t≤3°C; if T1 is equal to or greater than T2+t, it is judged that the refrigeration demand of the user is large; if T1 is less than T2+t, it is judged that the refrigeration demand of the user is small; if the set air volume level is not the super-high air volume level, jumping to step c; step c: judging whether the set air volume level is the high air volume level or not; step d: if the set air volume level is the high air volume level, further judging whether T1 is equal to or greater than T2+t; if T1 is equal to or greater than T2+t, it is judged that the refrigeration demand of the user is large; if T1 is less than T2+t, it is judged that the refrigeration demand of the user is small; and if the set air volume level is not the high air volume level, it is judged that the refrigeration demand of the user is small.