The utility model discloses a fuel gas filtration type unmanned aerial vehicle. The fuel gas filtration type unmanned aerial vehicle comprises an unmanned aerial vehicle body, an engine, a rotor wing spindle and a paddle clamping pin shaft. The unmanned aerial vehicle further comprises an air filter and a dynamic balance part. The air filter comprises a ventilating groove, a filter screen, a cowling and a sealing ring, wherein the ventilating groove is formed in the unmanned aerial vehicle, the filter screen is fixed in the ventilating groove, one end of the cowling is fixedly connected with an air inlet valve, the other end of the cowling is fixedly connected with the ventilating groove, and the sealing ring is arranged between the cowling and the engine. The dynamic balance part comprises a balance block, a balance piece and a connecting piece, wherein the balance block is provided with a mounting groove, the balance piece is fixed at the end of the balance block, one end of the connecting piece is fixedly connected with the balance block, the other end of the connecting piece is rotatably connected with the paddle clamping pin shaft, and thus the paddle clamping pin shaft can rotate relative to the connecting piece.