The utility model discloses an anti-falling protection device for an unmanned aerial vehicle. The unmanned aerial vehicle comprises a vehicle body, six vehicle arms connected to the periphery of the vehicle body, an air bag, an ejection device, a parachute, a controller and an acceleration sensor, the ejection device is connected with the parachute and installed on the vehicle arms, and the air bag is connected with the air generator and installed on the upper surface of the vehicle body; the controller is connected with the ejection device, the gas generator, the acceleration sensor, the height sensor, the vertical speed sensor, the camera device and the pressure sensor; the camera device is installed on the lower surface of the machine body, and the pressure sensor is installed on the side wall of the air bag containing cavity. According to the utility model, signals extracted by the sensor are subjected to data processing and analysis by the controller and then are combined with theimage speed change monitored by the camera device to accurately judge whether the unmanned aerial vehicle falls down or not, and the parachute and the air bag are adopted to protect the unmanned aerial vehicle, so that the unmanned aerial vehicle can stably fall down.