Abstract: This paper is a report on numerical classification of median-law grade classification units in the evergreen broadleaf forests in the Jinyun Mountain, Sichuan Province by means of the point-centred quarter method of plotless sampling technique. It is divided into five formations according to the edificator determined by the important value in the first tree stratum, and eight groups of association based on dominant in the second stratum (i. e. shrub stratum). Then the dominants of grass stratum are found out in the same way and the associations are determined. It is identified that the numerical classification method is applicable to the classification of the median-law grade classification units in the evergreen broadleaf forest.