Fatigue driving alarm device

The utility model discloses a fatigue driving alarm device, and aims at solving the technical problems that in the prior art, an existing fatigue driving detecting device is complex in structure, inconvenient to use and the like. According to the fatigue driving alarm device, a vehicle-mounted electronic control unit (ECU), a mileage detecting component and an engine rotation speed detecting component are utilized. When continuous driving mileage and continuous driving time of a driver reach preset values, the fatigue driving alarm device sounds to prompt the driver to keep on driving after the driver takes a rest, and therefore driving safety is ensured. The fatigue driving alarm device comprises a mileage sensor, an engine rotation speed sensor, a counting module, an alarm module and the ECU, wherein the mileage sensor, the engine rotation speed sensor, the counting module and the alarm module are connected with the ECU.