A compact long-endurance crop protecting unmanned aerial vehicle comprises a fuselage (1). The fuselage (1) comprises a first support plate (11). A fuel tank (2) and a pesticide container (3) supported by the first support plate (11) are provided on an upper portion of the fuselage (1). A second support plate (12) and four rotor wing assemblies (4) are provided on a middle portion of the fuselage (1). Multiple control modules (5) are provided on the second support plate (12). A shock absorbing assembly (6), a driving assembly (7), a spraying device (8), and a fuselage support foot (13) are provided on a lower portion of the fuselage (1). The first support plate (11) is fixedly connected to the second support plate (12), and a raised layer is formed therebetween. The control modules (5) are provided in the raised layer. The multiple rotor wing assemblies (4) are provided on a side surface of the raised layer, and are hinge-connected to the first support plate (11). An upper end of the shock absorbing assembly (6) is connected to a bottom surface of the second support plate (12), and a lower end thereof is connected to the driving assembly (7). The driving assembly (7) comprises an engine assembly (71) and a generator assembly (72). The engine assembly (71) is fueled via the fuel tank (2), and drives the generator assembly (72) to generate power, thereby supplying power to the unmanned aerial vehicle. The spraying device (8) comprises two spraying rods (81). The spraying rods are vertically fixed to the rotor assembly (4), and a nozzle (82) is provided at a lower end of the spraying rods.
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