The invention discloses a metal reflection type insulating plate for radiation shielding in a nuclear power station. The insulating plate comprises a shell, a support rack in the shell, reflection foils assembled on the support rack, a shielding plate arranged on the reflection foils and a cover plate which is arranged on the shielding plate and used for accommodating the reflection foils and the shielding plate into the shell. The metal reflection type insulating plate disclosed by the invention adopts a shielding plate structure, so that people can be protected in the operation period; as the reflection foil adopts a multi-layer structure, trapezoidal reflection foils and corrugated reflection foils are alternatively overlapped, and an air layer between adjacent reflection foils is partitioned into small spaces, then natural convection and heat conduction of air among the reflection foils are effectively prevented, and a good insulation effect and an anti-seismic property of a metal insulating layer plate are ensured.