Abstract:The Zhanhua jujube was treated by enzymatic hydrolysis in order to improve the juice yield.It showed that the complex enzyme （pectinase and cellulase）was better than that of the single enzyme.The most significant effect mass ratio of the complex enzyme（pectinase and cellulase）was determined to be 1 ∶2.On the basis of single factor results，the compound enzyme process parameters of jujube juice were optimized by Box-Behnken response design method.The effects of the composite enzyme adding amount，the enzymatic hydrolysis temperature and the enzymatic hydrolysis time on jujube juice yield and soluble solids content were studied.The results showed that the optimal technological parameters for producing jujube juice by compound enzyme method were as follows：the composite enzyme adding amount was 0.1 %，the enzymatic hydrolysis time was 68 min，and the enzymatic hydrolysis temperature was 50 ℃.Under these conditions，the jujube juice yield reached （72.27±0.30）%，the soluble solids content was up to（8.0±0.2）%，which was consistent with the predicted result.