Heat insulation component for nuclear energy device

The invention aims to disclose a heat insulation part for a nuclear energy device. The heat insulation part comprises metal alloy heat insulation shells, at least one layer of ceramic heat insulation plate with low heat conduction characteristic is arranged in the metal alloy heat insulation shells, interfaces between the metal alloy heat insulation shells are sealed by welding or flanges, the metal alloy heat insulation shells and the ceramic heat insulation plate form a sandwich heat insulation structure with ceramic wrapped by metal alloy. By utilizing the characteristics of high temperature resistance, corrosion resistance, pressure resistance and the like of the metal alloy and the low thermal conductivity, compactness and excellent mechanical property of the ceramic, the two materials form an organic whole under in-pile pressure to realize a heat insulation effect, so that the risk of loss of a heat insulation function under accident conditions (the metal cladding has cracks or is damaged) is avoided; s