Power-on self-starting circuit and control method thereof

The invention relates to the technical field of circuits, in particular to a power-on self-starting circuit and a control method thereof, and the circuit comprises a power supply end, a first capacitor, a second capacitor, a first discharge circuit, a second discharge circuit, a power conversion circuit, a self-starting circuit and a main control module; the first discharge circuit is used for releasing the electric energy stored in the first capacitor and the second capacitor when the power supply end cuts off the input; the second discharging circuit is used for releasing the electric energy stored in the main control module when the input of the power supply end is cut off; the self-starting circuit is used for pulling down the level of the power input port and the starting pin of the main control module when the power supply end is switched on, and triggering the main control module to be powered on and started; the power conversion circuit is used for converting voltage input by the power supply end into