A vehicle infrared projection device, includes a device body, an infrared light source module and a retaining clip, wherein the retaining clip is used to retain the device body below or above a vehicle license plate bracket, a projection opening set on the device body is provided as the projection direction of the infrared light source of the infrared light source module, the focus type lens of the infrared light source module limit an included angle of the projection angle of the infrared light source to 6-15 degree. By the composition of the above elements, the present invention may provide assistance for observing the long-distance road condition at night or poor weather, to thereby improve the traffic safety.