Vacuum insulated panels are distinguished by their outstandingly low thermal conductivity，which is approximately 0.004—0.01 W8226; m-18226;K-1，only 33% to 10% of that of the traditional heat preservation materials.The heat preservation mechanism of vacuum insulated panels is elaborated in the study，and the key elements that relate to the thermal property of vacuum insulated panels are analyzed，which include the pretreatment of core materials and the vacuum pressure.With time passing，the thermal conductivity of the VIPs can maintain a low value when pre-treated.The thermal conductivity of the vacuum insulated panel made in our lab were below 0.01 W8226; m-18226;K-1.By analysis and calculation，with this kind of VIPs applied to refrigerated containers，its exciting properties can not only meet the intensity requirement，enlarge the ship load due to its thin thermal insulation layers，but can also save energy consumption by more than 26.82% compared with traditional heat preservation materials.