Abstract: Using red sandstone plates for curtain walls of buildings is not common in China and abroad.There are almost neither standards for testing evaluation nor regulations for quality control and acceptance.On the basis of the national standard entitled Technical code for metal and stone curtain walls engineering(JGJ133-2001) and the property of red sandstones,this paper puts forward the indexes for testing evaluation of red sandstone plates as the curtain walls.The indexes include the physical and strength indexes. The red sandstone plates which are initially selected have to be tested to meet the design indexes.Especially the red sandstone should be tested for its stability under the conditions of the artificial rainstorm,strong wind and high temperatures.In the meantime,the relevant indexes must be evaluated and estimated.The red sandstone satisfying the indexes can then be used as curtain walls.