The multi-layer insulator uses aluminum foil as the reflective screen, which is with excellent reflective performance. And it uses the material with low thermal conductivity and low outgassing rate as thermal insulation materials to reduce heat radiation. The interlayer between the container shell and the inner liner is in high vacuum state which can prevent thermal convection of the gas. And the adsorbent with a large adsorption capacity at low temperature is used to ensure long-term stable and reliable performance of the container and long product life.