The community's use of plants is a valuable source of local knowledge that must be documented through ethnobotanical research. The CSI scores assess each plant's potential practical uses in terms of its support to traditional culture survival. The community around the Batutegi FMU has developed a tradition of managing the marga forest using useful plants and local wisdom. Of course, this contributes to the long-term viability of marga forests, which has economic, ecological, and social implications. The purpose of this study was to examine the level of utilization of useful plants as an effort to preserve the marga forest around Batutegi FMU. This research was conducted in November 2021 at Ngarip and Datarajan Village, Ulubelu District, Tanggamus Regency, Lampung Province, Indonesia. Respondents were selected purposively with the criteria to obtain 30 respondents. The instrument used in this study was an ethnobotanical questionnaire. Data were analyzed based on identification of plant species, plant uses, intensity of plant use, and plant exclusivity. Quantitative data are presented in the form of an cultural significance index (CSI). Based on the results of the study, plant that has an CSI value in the highest category (53.75) is padi (Oryza sativa). Plants that have an CSI value with a very low category (0.5) are mahoni (Swietenia mahagoni). The highest CSI in this type of padi is due to the familiarity of the benefits of rice among communities around the Batutegi FMU marga forest, making padi the main food ingredient favored by the majority of people.