Abstract: A self-feeding watering device comprises a water storage unit, a regulating component and a long nozzle cover, and a water guide string extending out of the water storage unit. The regulating component is engaged to the water storage unit. The cover comprises a top cover for connecting with an external container and a long nozzle tube penetrating through the top cover and communicating with the top cover. The long nozzle tube further penetrates through the regulating component and extends towards a bottom of the water storage unit. The string is partially placed at the bottom of the water storage unit, and partially extends out of the water storage unit. The string allow water to penetrate into outside of the unit, and further guiding the water into the soil for automatic irrigation. The device has a compact structural body, can adjust a watering flow rate by a simplified means.