Abstract: 【Objective】In this study, we aimed to evaluate the spatial distribution patterns and interspecific associations of dominant tree species in a coniferous and broad-leaved mixed forest on the Zijin Mountain.【Method】On the basis of the data collected from a 1 hm² plot, important values(IV)of the tree species were calculated and diameter at breast height(DBH)distributions were analyzed. The intensity of spatial aggregation, coefficient of interspecific association and significance of species dominance at the scale of 100 m² were also analyzed.【Result】In the broad-leaved forest on Zijin Mountain, Pinus massoniana, Quercus variabilis, Celtis sinensis, Lagerstroemia indica, Quercus glandulifera, Photinia davidsoniae and Pistacia chinensis were defined as the dominant tree species with top seven IVs. Apart from Pinus massoniana, the number of seedlings and saplings were more than bigger tree in the other dominant tree populations belong to growing type. All dominant tree populations showed a contagious spatial distribution, and the aggregation ranking was as follow: Photinia davidsoniae>L. indica>Q. glandulifera>Q. variabilis > C. sinensis>Pinus massoniana>Pistacia chinensis. The spatial distribution of the Pinus massoniana population gradually shifted to a random pattern along the successional process. In general, associations of the dominant tree populations tended to be positively correlated, but statistically non-significant. Among 21 species pairs of the seven tree species, 13 pairs were non-significantly positively associa-ted, one pair was significantly positively associated, and seven pairs were non-significantly negatively associated. Besides, the positive associations were mainly concentrated in the zonal native tree species.【Conclusion】Currently, the coniferous and broad-leaved mixed forest on the Zijin Mountain is gradually transiting to a deciduous broad-leaved forest with some evergreen components.