Metallic reflection type heat preservation plate

The invention provides a metallic reflection type heat preservation plate. The metallic reflection type heat preservation plate comprises two main parts, namely an outer heat preservation box and reflection foils, wherein the outer heat preservation box is formed by an inner shell plate, an outer shell plate, a support frame and surrounding sealing foils, the reflection foils are of the triangular corrugated shape, two adjacent triangular corrugated reflection foils are put in the outer heat preservation box in a staggered mode with an inclined angle of 90 degrees. Compared with the prior art, the heat preservation plate provided with the invention has the advantages of favorable heat-insulating performance, mechanical strength and seismic performance. The heat preservation plate can completely meet the performance requirements of metallic reflection heat preservation layers of a reactor pressure vessel of a nuclear power plant, can be used for constructing a metallic reflection heat preservation layer system of the reactor pressure vessel of the nuclear power plant, and also can be used for constructing a metallic reflection heat preservation layer system for main devices, such as an evaporator, a voltage stabilizer, a main pipe line, a main pump and the like of a loop of the nuclear power planet.