The invention discloses an unmanned aerial vehicle falling prevention device. The unmanned aerial vehicle falling prevention device comprises an unmanned aerial vehicle body, four vertical sliding barrels, four vertical sliding rods, four horizontal sliding barrels, four horizontal sliding rods, two vertical buffer frames, two horizontal buffer frames, four vertical buffer rollers, two horizontal buffer rollers, two buffer rubber skins, four coil springs and two air storage barrels. According to the unmanned aerial vehicle falling prevention device, by arranging the buffer rubber skins, the self-protection function is achieved when an unmanned aerial vehicle falls accidentally; by arranging the vertical sliding barrels, the vertical sliding rods, the horizontal sliding barrels and the horizontal sliding rods, the function of protecting the unmanned aerial vehicle in multiple directions is achieved; and by arranging the air storage barrels covered with elastic thin films, multiple protection for the unmanned aerial vehicle is achieved.