Additive of inorganic phase-change material for refrigerated transport

The invention relates to an additive of an inorganic phase-change material for refrigerated transport. The additive comprises the following ingredients (by weight): 0.5-1 part of diethanolamine, 0.1-0.2 part of glycol and 3-6 parts of hydrophilic fumed silica. The inorganic phase-change material for refrigerated transport is prepared by the following steps: putting an inorganic phase-change material into a container and stirring at normal temperature at medium speed, successively adding 0.5-1 wt% of diethanolamine and 0.1-0.2 wt% of glycol, and stirring until the solution is clear; regulatingto low speed and stirring, slowly adding 3-6 wt% of hydrophilic fumed silica, regulating pH of the solution to 6-7, and continuously stirring for 30-60 min. when the additive is used for modificationof the inorganic phase-change material, the operation is simple. Stability of the prepared inorganic phase-change material is high. The additive is especially applicable to an inorganic low-temperature energy-storage material