The invention relates to a high-ground-clearance-boom-sprayer water returning pipe system. The high-ground-clearance-boom-sprayer water returning pipe system mainly comprises a main pesticide chest, an auxiliary pesticide chest, a feeding pesticide chest, a three-way valve, a five-way valve, a primary filter, a secondary filter, a jet filter A, a jet filter B, a main pesticide pump, a jet pump A, a jet pump B, electromagnetic valve sets, spraying rods, spraying heads, a flow meter, a control line, a pressure adjusting device, a flow adjusting device, a tee joint and related pipes. The auxiliary pesticide chest is communicated with the main pesticide chest through an auxiliary-pesticide-chest jet liquid discharging pipe, the jet filter A, a jet connecting pipe A, the jet pump A and a main-pesticide-chest jet pipe in sequence; the main pesticide chest is communicated with the auxiliary pesticide chest through a main-pesticide-chest jet liquid discharging pipe, the jet filter B, a jet connecting pipe B, the jet pump B and an auxiliary-pesticide-chest jet pipe in sequence. The high-ground-clearance-boom-sprayer water returning pipe system has the functions that water is automatically added into the pesticide chests on the two sides through the main pesticide pump, pesticide is automatically mixed, water returning jet stirring is carried out, pesticide liquid of the pesticide chests on the two sides is balanced, and pesticide is accurately sprayed; the labor strength can be effectively reduced, the spraying quality is improved, and the pesticide applying effect is guaranteed.