In this study, we choose the street green space in Bayi District, Mainling Town of Mainling County and Zhamu Town of Bomê County in Nyingchi City as investigation sites. In each investigation site, we select the undamaged plant communities of moderate density as objects of investigation and record, and establish the investigation database. Based on the habitat records and natural ecological conditions, we analyze the growth adaptability of Ligustrum L. plants in Southeast Tibet and the key influencing factors. It is found that the Ligustrum L. plants introduced in Southeast Tibet mainly include Ligustrum lucidum Ait., Ligustrum quihoui Carr. and Ligustrum vicaryi. The growth adaptability of Ligustrum lucidum Ait. plants is divided into high level, middle level and low level. According to the investigation results, the frequency of Ligustrum lucidum Ait. plants with good growth status is greater than 65%. In general, the plants are fond of light, and have certain tolerance to cold. They can be cultivated in open field and show good growth adaptability in Southeast Tibet, so these plants can be further applied.