In this study, 211 golden buckwheat (Fagopyrum cymosum) accessions were used as experimental materials to evaluate four plant architecture-related traits, including plant height, stem diameter, number of main stem nodes and number of main stem branches, and the correlation analysis, principal component analysis (PCA) and cluster analysis were performed. The result showed that coefficient variation of the four tested traits ranged from 11.90% to 19.05%. The correlation analysis showed that the plant height was significantly positively correlated to the stem diameter (0.389**), number of main stem nodes (0.278**), and number of main stem branches (0.427**). The stem diameter was significantly positively correlated to the number of main stem nodes (0.521**) and the number of main stem branches (0.326**). The number of the main stem nodes was significantly positively correlated to the number of main stem branches (0.563**). PCA analysis divided the four traits into three principal components, which accounted for 91.82% of the total variation among the golden buckwheat accessions. The cluster analysis classified the 211 golden buckwheat accessions into seven distinct categories, among which, C1, including 29 accessions, had superior plant height（152.85 cm ± 5.04 cm）, thicker stem diameter（6.13 mm ± 0.70 mm）, the most number of stem nodes（14.28 ± 1.50）and more main stem branches（11.31 ± 1.41) as compared with the other six categories. Therefore, accessions in C1 can be used as excellent golden buckwheat genetic resources for further exploitation and utilization.