Abstract:An identifying method for different brands of Ejiao by using support vector machine （SVM） was in－ troduced. First， SVM analyzed the infrared spectrums of different brands of Ejiao， researching the pre-process－ ing of Ejiao spectrums systematically at the same time and the discrimination models of three brands of Ejiao were established. Method comparison was used to discriminate the four different clustering analysis algorithms （KNN， Bayes， LDF and SVM）. The experiment proved that the recognition rate and rejection rate of SVM were the highest in the cluster models of different brands of Ejiao. The results showed that this method could identify different types of Ejiao effectively.