Abstract: Epulis is a type of proliferative gingival disease, and usually occurs in the lip or buccal gingiva near the papilla canines and premolars. Females are more prone to epulis than male counterparts. The resection of large epulis is often accompanied by keratinized gingival narrowing and the exposure of bone and root surface, etc. In this article, a case of epulis admitted to the department of periodontal mucosa was reported. During surgical resection of epulis, coronally repositioned flap was simultaneously utilized to cover the exposed bone and root surface by combining the basic principle of mucogingival surgery. This technique can prevent the occurrence of postoperative complications to the largest extent, such as infection, bone absorption, root exposure and root dentin hypersensitivity, achieving excellent aesthetic repair of the soft tissues. Regarding the diagnosis and treatment of this case, the coronally repositioned flap has the advantages of simple operation and avoids the second surgical area.