Split type constant temperature hot water supply system for campus

The invention discloses a split type constant temperature hot water supply system for a campus. The split type constant temperature hot water supply system comprises a sewage pool and a sewage pipe connected with the sewage pool, wherein multiple stages of heat exchangers for heat exchange are arranged in the sewage pipe; the split type constant temperature hot water supply system is characterized by further comprising a cold water pipeline; after the cold water pipeline is subjected to heat exchange through the multiple stages of heat exchangers, one end of the cold water pipeline is connected with the top of a heat insulation water tank; the bottom of the heat insulation water tank is connected with the other end of the cold water pipeline; the heat insulation water tank is connected with a heating heat pump; the heating heat pump is provided with a heating device; the rear part of the heating heat pump is connected with a plurality of water meters; each water meter is connected with a card reader and a wat