When the Euclidean distance was selected as 23, the testing samples were clustered into two main groups. One group contained the samples of M. euchrestifolia, M. tetramera, M.kwangsiensis, and M. alata along with the positive control, DEET. The essential oils of M. koenigii and M. exotica were assigned to another group. As they were grouped together with DEET, four samples in the first group (Group A) have the repellent activity characteristics closer to that of DEET than other two samples in the second group(Group B). Therefore the samples of Group A had better property of the repellent activity. Moreover, the essential oils of M. tetramera and M. kwangsiensis in Group A with high yields were further isolated to obtain pure compounds.