The invention discloses a cascade type supercooling method ice storage system. The cascade type supercooling method ice storage system comprises a water chilling unit, a double-way pump, a low-temperature condenser, a throttling valve, a compressor, an evaporator, a refrigerating medium pump, a supercooling heat exchanger, a supercooling reliever, an ice storage groove, an ice storage pump, a heatexchanger and end equipment; the water chilling unit, the double-way pump and the end pump form a cold supply loop; the water chilling unit, the double-way pump, the cold side of the low-temperaturecondenser and the first hot side of the hot exchanger form a refrigerating / preheating loop; the hot side of the low-temperature condenser, the throttling valve, the cold side of the evaporator and thecompressor form a refrigerating agent loop; the hot side of the evaporator, the cold side of the supercooling heat exchanger and the refrigerating medium pump form a refrigerating medium loop; and the hot side of the supercooling heat exchanger, the supercooling reliever, the ice storage groove, the ice storage pump and the cold side of the heat exchanger form a supercooling loop. The cascade type supercooling method ice storage system is high in operating reliability, can effectively reduce the energy consumption of an ice making system and can increase the system COP; meanwhile, the prepared dynamic ice slurry is high in cooling speed and high in heat exchange efficiency, and the operation cost and the initial cost are greatly reduced.