The drone winch for crop spraying platforms allows agricultural UAVs to perform more than just spraying tasks by enabling precise payload lowering and small-item transport. Large spraying drones often fly over uneven farmland, orchards, and remote terraces where ground access is limited. This winch enables them to deliver field sensors, soil sample kits, irrigation tools, and emergency materials directly to targeted farm areas. The system features weather-resistant components to withstand moisture, pesticides, chemical residues, and dust. Its steady descent control protects sensitive devices while maintaining drone balance during spray missions. Designed for long flight times, the winch includes an energy-efficient motor and lightweight cable drum to minimize extra power consumption. Farmers and agricultural service teams benefit from improved efficiency, reduced travel time, and the ability to perform multi-purpose field operations using a single UAV.