Switching power supply

The utility model relates to the technical field of switching power supplies, in particular to a switching power supply, which comprises a PCB (printed circuit board) arranged in the switching power supply, a first discharge structure arranged in a high-voltage area of the PCB, and a second discharge structure arranged in a low-voltage area of the PCB, the first discharge structure is provided with a first discharge tip, and the first discharge structure is connected with a ground end in the high-voltage region; the second discharge structure is provided with a second discharge tip, and the second discharge structure is connected with the ground end in the low-voltage area; static electricity of the high-voltage area and the low-voltage area of the PCB is released in air through the discharging tip of the discharging structure, the static electricity is prevented from directly flowing through electronic components on the PCB, the electronic components are protected against damage by the static electricity, an