Abstract: The present disclosure provides a multifunctional vehicle-mounted cigarette lighter, including a cigarette lighter body, which is configured with a power plug matched with a vehicle cigarette lighter socket, wherein the cigarette lighter body is further provided with a control unit connected to an on-board warning light and a display unit in signal connection to the control unit; the control unit includes a control circuit board for synchronously acquiring the working mode of the on-board warning light, wherein the control circuit board is connected to the on-board warning light through a signal control line; the display unit includes a plurality of indicator lights for synchronously displaying the working mode of the on-board warning light, wherein the plurality of indicator lights are electrically connected to the control circuit board.