The invention provides a current doubled frequency reconstruction method and device and electronic equipment, and relates to the technical field of current reconstruction. The method is applied to anMMC converter, and comprises that the first amplitude and first phase angle of current doubled frequency in the MMC converter are obtained; a second amplitude and second phase angle of reconstructioncurrent doubled frequency are determined according to the first amplitude and first phase angle, and an expression of the reconstruction current doubled frequency is obtained; and according to the expression, a current reconstruction controller reconstructs the current doubled frequency of the MMC converter. Thus, fluctuation of capacitance and voltage can be narrowed, and increase of loss is prevented.