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The invention discloses an unmanned aerial vehicle for high-altitude air quality detection. The unmanned aerial vehicle comprises an unmanned aerial vehicle body; the outer walls at the bottom of thetwo ends of the unmanned aerial vehicle body are each provided with a first sliding groove; furthermore, a detection box is glidingly connected to the inner walls of the two first sliding grooves; theouter walls at one ends of the two first sliding grooves are each welded with a fixed block; furthermore, the outer walls at two sides of the other ends of the two first sliding grooves are each provided with a limiting block; the outer walls at one sides of the four limiting blocks are each provided with two spring rods; the outer walls at the other ends of the spring rods are each provided witha limiting plate; the outer wall of the bottom of the unmanned aerial vehicle body positioned at the inner sides of the two first sliding grooves is provided with two fixed rods; and furthermore, theouter walls at the bottoms of the two fixed rods are each provided with a suction cup. According to the unmanned aerial vehicle in the invention, a first filter net layer and a second filter net layer are arranged; therefore, some impurities in high altitude cannot enter the detection box; the accuracy of a detection result is ensured; the first filter net layer and the second filter net layer are glidingly connected to the inner walls of the second sliding groove and the third sliding groove; therefore, the filter net layer is convenient to replace; and the working efficiency is increased.