Abstract: The Rosseland mean opacity of hohlraum gold wall can be increased by adding other materials such as gadolinium to gold. At 0.1g/cm3 density and various radiation temperatures, the AuGd mixtures with equal fractional number density yield highest opacities. Using onedimension radiation hydrodynamics code RT87 combined with the Rosseland mean opacity database and state equations at multipleionized area, the radiation temperature of pure Au and AuGd mixture wall hohlraum were investigated under the condition of Xray source produced at ShenguangII laser facility. The simulation results show radiation energy loss of the wall decrease and radiation temperature increase 0.1~0.2MK for AuGd mixture hohlraum.