Objective To explore the effect of breast reduction surgery with modified double-ring incision dermal brassiere technique on breast morphology score in patients with breast hypertrophy and ptosis. Methods A total of 85 patients with breast hypertrophy and ptosis admitted to Zigong Fourth People's Hospital from January 2021 to December 2023 were selected as the research subjects. According to the random number table method, they were divided into the control group (n=42) and the observation group (n=43). The control group received conventional breast reduction surgery, and the observation group received breast reduction surgery with modiffed double-ring incision dermal brassiere technique. The operation-related indicators, breast morphology score and complication rate were compared between the two groups. Results The operation time, intraoperative blood loss and hospitalization time in the observation group were better than those in the control group (P<0.05). The scores of breast morphology in the observation group were higher than those in the control group (P<0.05). The incidence of complications in the observation group was 6.98%, which was lower than 38.10% in the control group (P<0.05). Conclusion Breast reduction surgery with modiffed double-ring incision dermal brassiere technique has an ideal effect in correcting breast hypertrophy and ptosis. It can effectively optimize operation-related indicators, improve breast morphology, reduce the incidence of complications, and is worthy of clinical application.