Abstract: A door-status warning light circuit includes a first light group capable of emitting light with high brightness or specific warning color and a second light group capable of emitting light with low brightness or specific safe color, and when any door of a fire truck or an ambulance is opened, the first light group can emit light with high brightness and the warning color to remind the driver that a door is not closed; and, after all doors are closed, the first light group lights off and the second light group lights up, so as to inform, by light with different brightness or different color, the driver that all doors are closed, thereby effectively reminding the driver of the door status of the vehicle in noisy environment.