The invention relates to a solar cell array charging shunt regulating circuit and in particular discloses a series sequence switch charging shunt control regulating circuit. The circuit comprises a bus voltage regulating unit, a pulse width modulation (PWM) signal generating unit, a charging shunt interlocking unit, a metal oxide semiconductor field-effect transistor (MOSFET) driving unit, a shunt MOSFET unit and a charging MOSFET unit, wherein the bus voltage regulating unit generates a regulating signal according to bus voltage sampling feedback and bus voltage setting; the PWM signal generating unit converts the regulating signal into a PWM signal; the charging shunt interlocking unit transmits the PWM signal to the shunt MOSFET driving unit or the charging MOSFET unit to be driven according to the charging requirement of a storage battery; and in the process of maintaining the bus voltage, the shunt MOSFET driving unit is controlled to shunt solar cell array power and the charging MOSFET unit is controlled to transmit the solar cell array power to the storage battery according to a driving signal. The shunt regulating circuit is integrated with a charging regulating circuit, and power supply and charging of a solar cell are combined.