The invention relates to an energy-saving temperature-control phase-change material. The energy-saving temperature-control phase-change material is characterized by comprising compositions in percentage by weight: 50-90% of phase-change host, 1-40%
melting point control agent, 0.1-10% nucleating agent, 5-15% of
crystal modifier and the balance of water. Crystallized hydrated salt phase-change material has the advantages that raw materials are easily available, the price is low, the
energy density is large and the like, and the defects of being
supercooling, carrying out phase separating, blocking and the like also seriously hinders the popularization and application. The phase-change host is of crystallized hydrated salt, has fixed
melting point, the phase-
change temperature is regulated through adding the
melting point control agent so as to be capable of completing meeting the requirement of normal application. The phase-change
crystal particles are fine through adding the
crystal modifier, phase separation can also be prevented, attenuation is slowed down, the stability of the phase-change materials is improved, and the service life of the product is prolonged.