Objective ·To obtain the evaluation tools of postoperative speech function of oral cancer in existing studies, and summarize the application methods, application scenarios and development status of the postoperative speech function assessment tools for oral cancer. Methods ·The methodological framework was based on the review method of the Joanna Briggs Institute evidence-based health care center in Australia. The databases included PubMed, Web of Science, Embase, CINAHL, CNKI, Wanfang and VIP. The English terms were ("oral cancer" or "oral cavity cancer" or "head and neck neoplasm*"[MeSH Terms]) AND ("speech" or" language" [MeSH Terms]) AND ("assess*" or "evaluat*"[MeSH Terms]), the Chinese terms were "speech", "speech disorders", "speech function", and the search discipline was limited to "stomatology" or "nursing".The retrieval time was from the establishment of the database to July 2022, and the included literature was summarized and analyzed. Results ·A preliminary search of 4 476 articles from the literature databases was obtained, excluding duplicate literature, literature that was not relevant to the purpose and content of the study, review literature, non-Chinese or non-English literature, etc. A total of 9 articles were included, including 7 cross-sectional studies and 2 cohort studies. The time range of the included literature was 1990?2022, and the national sources included the United States, Japan, Germany, India, etc. A total of three evaluation methods were summarized, namely scales, automatic identification technology and other methods such as internet of things (IoT) devices, in which scale evaluation is currently the most mainstream evaluation method, and speech handicap index (SHI) is one of the most widely used evaluation scales, which has been culturally adapted and localized in China, but the evaluation tools of local original research have not been retrieved. Conclusion ·Among the oral cancer postoperative speech assessment tools, the scale is the most widely used method, but there are few studies that can balance subjective speech assessment and objective speech assessment, and the domestic related research is vacant. In the future, relevant research can be carried out in combination with these two aspects, and a tool for assessing speech function after oral cancer surgery suitable for local languages can be developed.