Abstract: Five strains of Aleurites fordii Hemsl. were showed clear enzymatic bands by their peroxidase and isoenzyme using the polyacrylamide gel electrophoresis technology. The enzymatic band patterns may be divided into three areas according to the darkness and location of the stained bands. The Rf values of the strong bands are almost the same. It shows the close relation-ship of these strains in a species, but the number of other bands in each area and the Rf values of the bands differ from one strain to another show the differences for the strain's classification. The enzymatic band pattern of A. montana is quite different by the research. It has not only the small number of enzymatic bands but also no obvious strong bands compared with the five strains in question. So this work would become a useful means for classification in Aleurites.