Abstract: Morphological diversity of 14 materials of wild Brassica campestris L(WBc) collected from different area in Tibet was analyzed in this paper. The results showed that it was obvious different in morphological diversity of the 14 materials, especially rich in the characters of plant height, basal leaf, leaf of elongation stem, leaf of bolting stem and seed weight. The 14 materials of wild Brassica campestris L were clustered by the methods of chi-square distance and the sum of squares of deviations in 7 characters such as plant height, main stem diameter, number of branches, and pod number of main inflorescence. According to the morphological clustering analysis, the 14 materials could be divided into different groups as the following: Group1(G1) belong to branching type of below plant, including 4 materials of WBc-5, WBc-6, WBc-9; Group2(G2) had only one material of WBc -14, belonging to branching type of above plant; Group3(G3) belonged to average type of branching, including WBc-1~ WBc-4, WBc-7, WBc-8, WBc-10~ WBc-13.G1,G2,and G3 accounted for 21.43%,7.14% and 71.43% of the total germplasm resources respectively. At the threshold of 0.54, they could be divided into 5 subgroups, namely SG1, SG2, SG3, SG4 and SG5. It is scientific and reliable of this clustering method for comprehensive classification of wild Brassica campestris L in Tibet. In addition, the clustering results accurately reflect the differences between the various groups, which could provide a reliable basis for the correct evaluation of wild Brassica campestris L germplasm resources and breeding of fine varieties in Tibet. Key words:Tibet; wild Brassica campestris L; morphological characters; diversity; cluster analysis