Abstract: The heat transfer manner between the moon surface softlanding instruments and its exterior space environment was analyzed. The design and structure of the multilayer insulation blanket with lower equivalent emissivity were proposed, and the especial design of emissivity (ε) and solar absorptivity (α_s) of the outermost radiant shield and its influences on the radiant equilibrium temperature were also discussed. Furthermore, taking advantage of lunar soil characteristics, the deployable outer multilayer insulation blanket can create a surface zone with the relative constant temperature equivalent to that of the lunar soil constant temperature layer. 

Key words: Passive thermal control, Multilayer insulation, Radiative heat transfer, Lunar temperature, Lunar probe