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Objective To investigate the application of oncoplastic surgery in breast-conserving surgery.Methods We retrospectively analyzed the clinical data of 103 breast cancer patients who underwent breast-conserving surgery in the First Affiliated Hospital of Henan University. All the patients were female whose tumor volume-to-breast volume ratio was greater than 20％. Fifty-two patients were treated with oncoplastic breast-conversing surgery (observation group), and 51 patients were treated with traditional breast-conserving surgery (control group). The volume of resected tissue, subjective satisfaction with breast shape, objective score of breast shape, and follow-up were compared between the two groups. Results In the observation group, the weight of resected breast tissue was 64.2–172.1 g, with a median of 98.7 g. In the control group, the weight of resected breast tissue was 67.5–175.7 g, with a median of 102.3 g. After 12 months of follow-up, the subjective satisfaction rate and objective score of breast shape in the observation group were significantly better than those in the traditional breast-conserving surgery group (P 0.05). Conclusion Oncoplastic breast-conserving surgery leads to better cosmetic results and a more satisfactory clinical results.