Abstract: The extracting technique of polysaccharide from Clematis chinensis Osbeck was studied in this paper. Polysaccharide was extracted by water．The time，temperature ，ethyl alcohol concentration and water weight ratio were considered as the main factors affecting this extraction．The experiments were first done on single factors．Then the orthogonal layout L9(34)was used．Results showed that the high extraction rate was 7.57％ at optimum conditions of the weight of Clematis chinensis Osbeck／water ratio of 1：15, 15h， 80℃ ， and the ethyl alcohol concentration of 80%．