The present disclosure discloses a charging circuit, a terminal and a charging method, and belongs to a field of electronic circuit technologies. The charging circuit includes: a control circuit and a voltage reduction circuit connected to the control circuit; wherein the control circuit is configured to obtain a feedback signal indicating a generation frequency of a control signal, generate the control signal based on the feedback signal, and send the control signal to the voltage reduction circuit; and the voltage reduction circuit is configured to obtain an input voltage and the control signal, perform voltage reduction processing on the input voltage based on the control signal and output an output voltage to a battery, wherein an output current corresponding to the output voltage is greater than an input current corresponding to the input voltage, and the output voltage is configured to determine the generation frequency.