Abstract: To improve the flavor of satsuma mandarin,compounded mandarin juice which was mixed with orange juice and apricot juice had been studied. This article focused on the testing of physical and chemical index and electric tongue to the compounded juice.By establishing the PLS model between response value of seven sensor of electric tongue and the score of compounded juice's soluble solids to acidity ratio,citric acid and sensory taste,the fitting and prediction of typical indices of compounded satsuma mandarin juice had been accomplished by this article.The results showed that the better fitting correlations were 0.87,0.90,0.85 respectively to solid acid ratio,citric acid and sensory taste by electric tongue,however,the prediction effects were not ideal,more samples need to be added to reduce the standard deviation and improve the prediction accurancy.