Abstract: In order to explore a simple and convenient method to evaluate the antihyperlipdemic effects of dark tea, a model based on the components of sixteen samples was built by the method of principal component analysis.A model of HepG2 steatosis in vitro was established under the conditions contained oleic acid. Based on the cell viability test ( MTT value) , lipid in cells was used to evaluate the effect of dark tea on HepG2 steatosis.The result showed that both the result of model predicting and verificational test were the same.So the model to evaluate the antihyperlipdemic effects of dark tea was objective and practical.