Twelve indicators of peach juices and the juice yield were determined among 23 different cultivars.The core indicators were identified by Principal Component Analysis( PCA) and Cluster Analysis. The weights of core indicators were estimated by Analytic Hierarchy Process( AHP). "Reasonableness and Satisfaction Index"and Multivalue Theory were applied to establish the quality evaluation model. The 23 cultivars were graded into three levels according to the method of Cluster Analysis based on their scores. The discrimination functions were established for peach juice quality by Discriminant Analysis. According to the results,the ratio of SSC /TA,juice yield,brown degree,L*value and total phenolics were the core indicators which were used to evaluate the juice quality."Guantao14"and"Jingyu"were the most proper cultivars for juice processing and the"Dajiubao"was the least one among the 23 cultivars. Three discrimination functions were established for peach juice quality,which had satisfactory recognition accuracy up to 100%( modeling samples and test samples). The discrimination method are very effective in evaluating the peach juice quality.