The invention discloses a rice fertilization-with-water device including a fertilizer storage device, a power device, an energy supply device and a fertilizer solution conveying pipeline; the fertilizer storage device is arranged at a ridge of a water inlet of a rice field and is used for storing a fertilizer solution; the power device is arranged inside the fertilizer storage device and is electrically connected with the energy supply device; the energy supply device is arranged outside the fertilizer storage device; one end of the fertilizer solution conveying pipeline is connected with the power device, and the other end of the fertilizer solution conveying pipeline extends out of the fertilizer storage device. The structure is adopted, and the rice fertilization-with-water device has the advantages of simple structure, low equipment cost, convenient installation and disassembly, and convenient and flexible operation, rice fertilization can be allowed to be simpler, more convenient and more uniform, rice fertilization operation manpower cost is saved, and integration of water and fertilizer of rice is further realized, rice precise fertilization is achieved, waste of the fertilizer cannot be caused, and water, fertilizer and labor are saved, so that the utilization rate of the fertilizer is saved.