The invention provides a power box enabling a mosquito expelling function during night maintenance. The power box structurally comprises a conical top cover, a power box main body, heat dissipation openings, connecting hinges, a switch handle and a maintenance door; under a condition that the power box is abnormal at night and needs maintenance, when the maintenance door is opened outwards, irradiation lamps which are located on two sides of the maintenance door and are connected with wires emit light of two different colors; the irradiation lamp on the left side emits red light, and the irradiation lamp on the right side emits yellow light; the red light and yellow light are respectively irradiated to light reflection lenses at opposite sides; and the light is reflected to light condensation particles on light condensation grooves through the light reflection lens so as to be mixed, and then the mixed light is refracted and is irradiated downwards, so that orange light rays can be emitted. The power box can be maintained at night; when the maintenance door is opened, a power source triggering mechanism is triggered to switch on a power source, so that the illumination mechanisms on the two sides emit the yellow light and red light; the light rays are reflected to a light condensation mechanism through the reflection mechanisms so as to be mixed; the mixed light is refracted toemit the orange light rays; and therefore, mosquitoes are prevented from flying into the power box to cause sparks and incur a fire disaster during electrification.