Power box used for switching power supply

The utility model relates to a power box used for a switching power supply. The power box comprises a power box main body (1); the power box main body (1) is provided with a 220V input power line interface (2); and the power box main body (1) is also provided with a low-voltage output interface (3), the position and shape of which are different from that of the 220V input power line interface (2). According to the power box used for the switching power supply, the high-voltage input interface and the low-voltage output interface are separated and have different shapes, so that potential safety hazard caused by wrong plug-in is prevented; an upper end cover of the power box is of a buckle-type structure, a barrel of the power box is covered without exposing screw holes, and probability that water enters into the power supply is reduced; heat dissipation channels are disposed in the power supply, internal ventilation is enhanced, and heat the whole power supply is reduced; heat of key components of the power supply is directly dissipated via the aluminum housing of the main body, and heat dissipation areas are increased; and the power supply end cover is prepared by plastic materials, so that resonance noises can be reduced when a fan is fixed on the plastic end cover.