Plant community classification and ordination categorizes plant communities according to characteristics or attributes, and is an important means of analyzing the ecological relationship between vegetation and the environment. This is the most basic, but complicated research content in vegetation ecology. The western Sichuan region is dominated by mountainous and plateau geomorphology. The complex and unique natural and geographical condition of this area results in an abundance of plant species. However, they are exceedingly difficult to classify because of complex environmental conditions and the rich number of species. To understand the effect of environmental factors on the Osmanthus serrulatus plant community, this study investigated the environmental factors, TWINSPAN classification, species and diversity index, and environmental factors of Detrended Canonical Correspondence Analysis (DCCA) in the community region of Osmanthus serrulatus in the Dongla Mountain, Baoxing County, Sichuan Province. Because the DCCA ordination axe for clustering and classification combines vegetation and environmental factors, it can properly express the environmental and structural gradient of the plant community, which reflects the spatial variation of the environment and its structure. In this study, the classification and ordination of the Osmanthus serrulatus community in western Sichuan mountain regions was performed in order to lay a foundation for further analysis of the biodiversity pattern and maintenance mechanism of the fragmented and crushed habitat of the Osmanthus serrulatus community. The results showed that:1) 24 community plots were divided into 12 coenotypes by TWINSPAN, which revealed the community successional trend in space. 2) Osmanthus serrulatus were distributed in the southwest and south slopes of the ditch, which had higher soil moisture levels and canopy densities, and coexisted with Carpinus turczaninowii, Litsea moupinensis, Euptelea pleiosperma, Rhododendron fortunei, Lysimachia baoxingensis, Phlomis umbrosa, and Asplenium trichomanes. 3) The DCCA ordination results verified the rationality of the TWINSPAN classification, and indicated that the organic and humus content were mainly environmental factors which influenced the Osmanthus serrulatus plant community type and spatial distribution.