Objective] To research the protein extraction technology in concentrated white water in chip factory , and to alleviate the environ-mental pollution caused by organic compounds, and to promote sustainable environment and economic development.[ Method] Effects of pH value on soluble protein in concentrated white water were researched.[Result] The optimal technology parameter for extracted soluble protein was as follows: acid extraction pH 3.5, alkali precipitation pH 8.0.[Conclusion] A suitable pH value plays a decisive role in efficient pro-tein extraction of concentrated white water.%[目的]研究薄片厂抄造段浓白水中蛋白质回收工艺，减少废水中有机物对环境造成的污染，促进环境与经济可持续发展。[方法]分析pH对提取再造烟叶浓白水中可溶性蛋白质的影响，确定适宜工艺参数。[结果]从再造烟叶浓白水中提取可溶性蛋白质的最佳工艺参数为酸溶pH 3．5，碱沉pH 8．0。[结论]选取适宜的pH可对高效提取浓白水中蛋白质起到决定性作用。
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