The National Standard Sample for Spectral and Chemical Analysis of Silicon-Copper-Zinc Cast Aluminum Alloy developed by our company on June 15, 2011 has been appraised and accepted by the competent national authorities. The standard sample of this project has determined the standard values of 13 elements in the standard sample of cast Aluminum Alloy, which can be used for trace to constant analysis of high-silicon copper-zinc cast Aluminum Alloy, reaching the international advanced level of similar standard samples.