Abstract: Utilizing the technology of electrophoresis on isozyme, the soluble protein 、SOD、 ETS、PPO、MDH、PO and so on which are obtained from 23 Curvularia lunatas in maize are analyzed. The results show that there is much difference among different strain.The finding obtained by cluster analysis on these stains shows that the stains may be generally divided into 7 series when they get together on the interconnection distance of 0.36.This finding is similar to the grouping by pathogeniciy, but there is also some difference or less close relationship.