The invention discloses a digital water-saving master control room for a park, relates to the technical field of water supply systems, is used for solving the problem that the water supply amount of park water supply cannot be accurately controlled, and provides the digital water-saving master control room for the park and a constant-pressure partitioned water supply system which are used for carrying out constant-pressure partitioned water supply on the park. The system comprises a constant-pressure partitioned water supply system, a data acquisition system, a water and fertilizer integrated system, a transmission display system, a green prevention and control inspection system, a high-pressure spraying system and a master control room, the constant-pressure partitioned water supply system, the data acquisition system, the water and fertilizer integrated system, the transmission display system, the green prevention and control inspection system and the high-pressure spraying system are all connected with the master control room, the water and fertilizer integrated system is utilized, the irrigation time is finally determined according to the temperature and humidity of soil, the area needing irrigation and the needed irrigation amount, and the irrigation efficiency is improved. Therefore, on-demand irrigation and on-demand fertilization are achieved, the utilization rate of water resources is increased, and insufficient water and fertilizer supply or excessive waste is avoided.