An orchard maintenance device comprises a guide wheel, a water tank supporting plate, a water suction pipe, a water suction pump, a water inlet pipe, a main water tank, a main water tank floater guide rail, a main water tank floater, a low position sensor for the main water tank, a high position sensor for the main water tank, a medicine kit electromagnetic valve, a medicine kit, a filter screen, a medicine kit guide rail, a medicine kit floater, a height sensor for the medicine kit, a volume scale, an A water distribution tank, a high position sensor for the A water distribution tank, an A water distribution floater, an A water distribution tank floater guide rail, a low position sensor for the A water distribution tank, a B water distribution tank, a high position sensor for the B water distribution tank, a low position sensor for the B water distribution tank, a B water distribution floater, a B water distribution tank floater guide rail, an electromagnetic valve for a medicine kit B, an electromagnetic valve for a medicine kit A, a B water outlet electromagnetic valve, a main water transfer pipe, a pressure water pump, an A water outlet electromagnetic valve, a hand-operated stirrer, a main controller, an A connection electromagnetic valve, a B connection electromagnetic valve, a one-way control electromagnetic valve, a water transfer branch pipe, a support pillar pipe, a V-shaped bracket, a rotating nozzle and a water valve. The orchard maintenance device is capable of accomplishing orchard maintenance.