A large pesticide and fertilizer spraying system comprises a large truss type sprinkler and also comprises an electric appliance control box (6), a storage tank (7), a system pump (8), and a lifting mechanism disposed at the bottom of the large truss type sprinkler. A pipeline (18) and multiple spray heads (20) separately connected to the pipeline (18) by means of branch pipelines are disposed on the lifting mechanism in the length direction of the sprinkler. Each branch pipe where the corresponding spray head (20) is located is provided with a solenoid valve (19). A liquid inlet of the pipeline (18) is connected to a liquid outlet of the system pump (8) by means of a connecting hose (13), and the other end of the hose (13) connected to the liquid inlet of the system pump (8) is disposed in a pesticide mixing tank or a fertilizer mixing tank. An output end of the electric appliance control box (6) is separately connected to the system pump (8) and the control end of the solenoid valve (19). By using the large pesticide and fertilizer spraying system, the problem of undiversified uses of large sprinklers is solved, the spraying system has a wide application scope, the height of the pesticide spray head or the fertilizer spray head can be adjusted according to different crops, and the spray heads can be replaced into different spray heads for spraying different pesticides or fertilizers.L'invention concerne un grand système de pulvérisation de pesticide et d'engrais, qui comprend un grand arroseur de type treillis et comprend également un boîtier de commande d'appareil électrique (6), un réservoir de stockage (7), une pompe de système (8), et un mécanisme de levage disposé au niveau de la partie inférieure du grand arroseur de type treillis. Un pipeline (18) et de multiples têtes de pulvérisation (20) reliées séparément au pipeline (18) au moyen de pipelines de ramification sont disposés sur le mécanisme de levage dans la direction de longueur de l'arroseur. Chaque tu
