The invention relates to the technical field of power, and especially relates to an equalizing charging circuit for a battery pack, and a control circuit for an equalizing charging circuit. Based on the above equalizing structure, an inversion module is started for charging a low-voltage battery unit when voltage of the battery unit is too low, and then a chopping module is used for charging the whole body, thereby completing the equalization of key tasks. When the voltage of the battery unit is too high, the chopping module is started at first, and enables the electric quantity of the high-voltage battery unit to be transferred to other low-voltage battery unit, and then the inversion module is used for charging the whole body, thereby achieving the equalizing charging. According to the scheme, the two modules cooperate with each other, thereby reducing the equalizing time, guaranteeing the equalizing precision, avoiding a condition that a single module cannot adapt to various types of imbalance conditions and achieves the equalizing function and effect improvement.