对控制梨多酚氧化酶（ Ｐ Ｐ Ｏ）活性的方法进行了研究，以氯化钠、柠檬酸、抗坏血酸为 Ｐ Ｐ Ｏ活性抑制因子，通过三因子二次回归组合设计建立回归方程，从而准确地反映因子和 Ｐ Ｐ Ｏ活性之间的关系，预示抑制因子用量的多少对 Ｐ Ｐ Ｏ 活性的影响程度和趋势，得出三个因子在抑制酶活性作用中的最佳配比，并分析了各因子间的交互效应。 The method of controlling the activity of pear polyphenol oxidase (P P O) was studied. Sodium chloride, citric acid and ascorbic acid were used as P P O activity inhibition factors, and the regression equation was established through the combination of three factors and quadratic regressions to make it accurate And the relationship between P reflectance and P P O activity, indicating the extent and tendency of the amount of inhibitory factor on the activity of P P O, the optimal ratio of the three factors in the inhibition of enzyme activity was obtained and analyzed Interaction between various factors.