Production of nucleic acid yeast is the combination of single cell protein production with ribonucleic acid production.Products obtained are denucleic acid yeast and ribonucleic acid.Denucleic acid yeast is a kind of single cell protein with protein content as high as over 50%,and belongs in the high quality feed protein.Nucleic acid is extensively used in food iudustry,medical industry and agriculture.At first,make use of corn starch as raw material and adopt integrated biotechnology to produce yeast.Then extract nucleic acid from yeast.The waste water produced from manufacturing process is consummed by single cell protein productive technique,thus evidently reduce the cost of single cell protein and bring about economic benefit and social benefit.