Phase change energy storage technology is based on the three-phase characteristics of the substance (ie solid phase, liquid phase, gas phase) mutual conversion to achieve energy storage and discharge. There is a phase change phenomenon and no phase change when the temperature of the material changes, and the heat energy absorbed and released differs from several times to hundreds of times. The so-called phase change energy storage is to use this principle, according to the cold chain transport different temperature requirements, the different phase change temperature materials are reasonably configured to achieve the effect of phase change cold storage and heat storage, and its physical reaction verifies the energy conservation law. The use of phase change materials will significantly improve the thermal insulation time of thermal insulation equipment during transportation.