An equalization current adjustment method, wherein the equalization current adjustment method is applied to a frequency gating battery pack active equalization apparatus, and comprises: determining a to-be-equalized battery unit in a battery pack, and obtaining a current actual equalization current value of the to-be-equalized battery unit; and when a difference between the current actual equalization current value of the to-be-equalized battery unit and a target equalization current value does not fall within a range of a preset threshold, adjusting a fundamental amplitude of an alternating current power supply of a target circuit on which the to-be-equalized battery unit is located and/or a voltage gain of the target circuit, so that the difference between the current actual equalization current value of the to-be-equalized battery unit and the target equalization current value falls within the range of the preset threshold, wherein the target equalization current value is an equalization current value obtained by the frequency gating battery pack active equalization apparatus according to a current energy status of the to-be-equalized battery unit, and the target circuit is a circuit that comprises a circuit component connected to the to-be-equalized battery unit, the alternating current power supply, and the to-be-equalized battery unit; characterised in that each battery unit in the battery pack is connected to a filter unit with a corresponding frequency interval, wherein any two frequency intervals of the filter units have mutually non-overlapping parts; and in that the frequency gating battery pack active equalization apparatus is used to charge the to-be-equalized battery unit by outputting an alternating current, the frequency of which falls within the frequency interval of the filter unit of the to-be-equalized battery unit. determining a to-be-equalized battery unit in a battery pack, and obtaining a current actual equalization current value of the to-be-equalized battery unit; and when a difference between the current actual equalization current value of the to-be-equalized battery unit and a target equalization current value does not fall within a range of a preset threshold, adjusting a fundamental amplitude of an alternating current power supply of a target circuit on which the to-be-equalized battery unit is located and/or a voltage gain of the target circuit, so that the difference between the current actual equalization current value of the to-be-equalized battery unit and the target equalization current value falls within the range of the preset threshold, wherein the target equalization current value is an equalization current value obtained by the frequency gating battery pack active equalization apparatus according to a current energy status of the to-be-equalized battery unit, and the target circuit is a circuit that comprises a circuit component connected to the to-be-equalized battery unit, the alternating current power supply, and the to-be-equalized battery unit; characterised in that each battery unit in the battery pack is connected to a filter unit with a corresponding frequency interval, wherein any two frequency intervals of the filter units have mutually non-overlapping parts; and in that the frequency gating battery pack active equalization apparatus is used to charge the to-be-equalized battery unit by outputting an alternating current, the frequency of which falls within the frequency interval of the filter unit of the to-be-equalized battery unit.