The invention provides a
cold preservation refrigeration device and a
refrigeration method thereof. The
cold preservation refrigeration device comprises a liner, a refrigeration
system and a
magnetic field generator. A super refrigeration room for storing food to be refrigerated is limited inside the liner. The refrigeration
system is configured to provide
cooling capacity for the super refrigeration room in a controlled mode, reduce and maintain the temperature of the food to be refrigerated to be a first preset temperature and first preset time, and then the temperature of the food to be refrigerated is lowered to a preset storage temperature of the food to be refrigerated. The
magnetic field generator is used for providing a uniform
magnetic field for the super refrigeration room and configured in the mode that when the time of the temperature of the food to be refrigerated maintained at the first preset temperature reaches the first preset time, the magnetic field generator is started, so that the food to be refrigerated enters a
supercooling state under the effect of the magnetic field; and after a second preset time is started, the magnetic field generator is
shut down, so that the food to be refrigerated gets rid of the
supercooling state, the temperature of the food to be refrigerated is quickly reduced below the maximum ice
crystal generation zone of the food to be refrigerated, the
cell integrity in the process of food refrigeration is better preserved, and the refrigeration quality of the food is improved.