Objective:To investigate the influencing factors for postoperative quality of life(QOL) in patients with oral and maxillofa-cial malignancies(OMMs). Methods:A total of 90 patients with oral and maxillofacial malignancies(OMMs) who underwent surgical treatment in a grade A tertiary stomatological hospital in China from January 2016 to March 2018 were selected as subjects. Twenty-nine factors of demography,social psychology,and medical care were collected by on-site interviews,questionnaires,and data mea-surements. The postoperative QOL of patients was evaluated using Functional Assessment of Cancer Therapy-Head and Neck-V4 [FACT-H&N(V4)]. Independent factors for postoperative QOL were analyzed by univariate and multivariate analyses. Results:The univariate and multivariate analyses showed that segmental resection of lower jaw bone(OR=50.897,95%CI=1.319 to 1 964.684,P=0.035),M.D. Anderson Dysphagia Inventory(MDADI) score(OR=1.260,95%CI=1.086 to 1.462,P=0.002),good social support(OR=677.074,95%CI=1.166 to 381 787.087,P=0.045) and mini nutritional assessment(MNA) score(OR=28.788,95%CI=1.151 to 719.778,P=0.041) were independent influencing factors for the QOL of patients with OMMs. Conclusion:It is an effective way to improve the postoperative QOL of patients with OMMs by retaining the continuity of lower jaw bone,reconstructing swallowing func-tion and improving nutritional status and social support.