The invention proposes a constant-current and constant-voltage controlled charging circuit. A half-bridge circuit is used for receiving a first direct current, an output end of the half-bridge circuit is connected with a first filter circuit so that the first direct current is converted to a second circuit, the second direct current is used for charging a charging load, a dual-closed loop control circuit is used for sampling an output current of the output end of the half-bridge circuit, sampling an output voltage of an output end of the first filter circuit, outputting after comparing the output voltage with a set voltage value and performing current-limiting outputting after comparing an output signal with the output current, a current-limiting outputting signal is used for controlling the duty cycle of a switch of a switch circuit of the half-bridge circuit, the duty cycle is controlled so that the output current is roughly constant while the output voltage is increased when the output voltage is smaller than the set voltage value, and the duty cycle is controlled to be reduced so that the output current is reduced while the output voltage is roughly constant when the output voltage is equal to the set voltage value. By the charging circuit, the charging time is short, overcharge can be prevented, and thus, the service lifetime of power storage equipment can be prolonged.