Abstract: Studies the feasibility of using chemical fingerprint and computer pattern recognition to distinguish Rizhao green tea products and other parts of the country. Adopt the methods of principal component and linear discriminant analysis respectively, successfully established discriminant model. Principal component analysis method can't distinguish, but can show the differences between them. Linear discriminant method through mathematical statistics analysis had significant differences, discrimination model was established. Verified, modeling of discriminant accuracy was 95.7%, the discriminant accuracy of validation set was 97%. The result showed that adopt the method of linear discriminant analysis can better distinguish Rizhao green tea and the rest of the country, Provide the basis for protection of Rizhao green tea brand.