Control method of air conditioner, air conditioner and storage medium

The invention discloses a control method of an air conditioner, the air conditioner and a storage medium. The method comprises the steps that the air conditioner is controlled to run in a preset defrosting mode, a first temperature characteristic parameter of an indoor heat exchanger of the air conditioner is obtained, and the air conditioner is in a heating state in the preset defrosting mode; determining a target rotating speed of an indoor fan of the air conditioner according to the first temperature characteristic parameter; and controlling the indoor fan to operate at the target rotating speed. The method aims at improving the comfort of indoor users while ensuring the defrosting effect.