The invention discloses a water supply and control integrated disc granulator, which comprises a support frame, wherein a granulating cylinder is arranged on the support rack, an atomized water supply device matched with the granulating cylinder is arranged on the support rack; in the atomized water supply device, a water pump, a turbo type pressurizing device, a pressure adjusting device and a high-pressure atomizing nozzle are communicated through water supply pipelines; and the high-pressure atomizing nozzle is arranged at the upper part of the granulating cylinder and is matched with the granulating cylinder. According to the water supply and control integrated disc granulator, the problem that the granulating and water spraying of a fertilizer cannot be integrated is solved; the processes of granulating and water spraying are integrated; and dust is proofed, the loss of raw materials is reduced and the environment is effectively protected.