The invention discloses water conservancy irrigation apparatus with a fertilization function. The apparatus comprises a bottom plate, a water tank, a water pump, a first water pipe, a jet device, a second water pipe, a third water pipe, a fourth water pipe, a spherical shell, a mixing tank, a fifth water pipe, a motor, a crankshaft, stirring rods, a sleeve, a rack, a gear and a spray nozzle. The apparatus provided by the invention is provided with the jet device, when fertilization or pesticide spraying is required, a fertilizer or a pesticide is directly sucked and mixed with water through the jet device, a mixture is prepared when the mixture needs to be used, so that the apparatus is very convenient and can avoid the problem of waste or insufficient use because a preparation amount isdifficult to determine; the apparatus is provided with the motor, a grinding ball and the stirring rods, so that the solid fertilizer or the pesticide is further crushed or stirred to be better fusedwith water, and a utilization rate of the solid fertilizer or the pesticide is improved; and the apparatus is provided with the crankshaft, the rack, the gear and a rotating shaft, the crankshaft, therack, the gear and the rotating shaft cooperate with one another to drive the spray nozzle to rotate in positive and negative directions, so that a spraying range is enlarged, spraying is more fullyand uniformly, and irrigation efficiency is improved.