The invention discloses a control method of an electronic expansion valve. The control method comprises the following steps that (10), the target superheat degree T of the electronic expansion valve is pre-stored; (20), the current superheat degree Tsh of the electronic expansion valve is obtained, the superheat degree difference value delta Tsh between the current superheat degree Tsh and the target superheat degree T is calculated, and the absolute value of the superheat degree difference value delta Tsh is the superheat degree deviation |delta Tsh|; and (30), the electronic control valve iscontrolled according to the superheat degree deviation |delta Tsh|, so that the electronic control valve has different open degrees. Therefore, in the control method of the electronic expansion valve, the open degree of the electronic expansion valve can be adjusted in real time according to the current superheat degree deviation |delta Tsh| of a refrigerating system, thus the refrigerating system keeps the optimal refrigerant flux, then parameters of the refrigerating system is in an optimal state, and the stability and performance of the system are improved.