The invention provides a voltage equalization control method for an energy storage load grid side rectifier. The method comprises steps: the parameters of the energy storage load grid side rectifier are acquired; virtual zero sequence voltage is calculated according to the parameters of the energy storage load grid side rectifier; and a virtual zero sequence voltage control amount capable of equalizing the midpoint voltage in the current control period is calculated according to the virtual zero sequence voltage, and based on the virtual zero sequence voltage control amount of the midpoint voltage, energy storage load grid side rectifier voltage control is carried out. According to the technical scheme provided in the invention, through detecting the capacitance voltage deviation of upperand lower bridge arms of the DC side of the rectifier in real time, the virtual zero sequence voltage is calculated and obtained to realize equalization control on the midpoint voltage, complicated sector vector type judgment is avoided, the algorithm is thus simplified, and the control real-time performance is improved.