The present disclosure relates to the field of intelligent wearable technologies, and provides a power supply circuit, a power supply circuit generation method, and a power supply circuit control method. The present disclosure provides a power supply circuit, including: a bandgap voltage reference Bandgap, a real-time detection and control module, and an alternate voltage source module, where the real-time detection and control module adjusts an output point voltage of the alternate voltage source module according to an output voltage of the Bandgap; and when the output point voltage of the alternate voltage source module reaches a target voltage, the real-time detection and control module closes the Bandgap and supplies power by using the alternate voltage source module. In such a power supply circuit, after adjustment of an output point voltage of an alternate voltage source module is completed, a Bandgap does not need to keep a power-supply state, and therefore power consumed by the Bandgap is reduced based on stable voltage supply.