Abstract: Objective To investigate the application of adipofascial flaps for the repair mammary defects in breastconserving surgery. Methods The distance from the nipple to the stemum and nipple to the midline of 35 middle type women patients were measured before and after mammoplasty. Total excision of breast lumps and surrounding tissue were performed， and the tissue removed from patients was weighed. Breast reconstruction was accomplished synchronously with the application of a widebased mammary adipofascial flap in stageⅠbreast reconstruction. The relationship between the quantity of tissue defects and the filling effect of fascial flap in mammoplasty were analyzed as follow-up. Results The median weight of the tissue removed from 35 patients was （69.63±11.74） g. There were no statistically significant differences in the distance from nipple to the sternum or nipple to the midline before and after treatment（P＞0.05）. Postoperative incisions showed proper healing， with no skin flap necrosis or fat necrosis. 3 patients who underwent radiotherapy for fat liquefaction necrosis， showed effusion，pumping well. Breast malignant lesions were excised completely with negative margins on pathological examination， and a basal adipofascial flap was generated，showing a significant depression in 4 patients. The rate of mammoplasty was 886％（31／35） according to Joint Center of Radiotherapy（JCRT）. The follow-up period of 4.30 months in the 35 patients（average follow-up was 19 months）. No distant metastases or local recurrence was observed. Conclusion Patients classified as middle type had an average weight of tissue removed of （69.63±11.74） g， and the defect were corrected using a mammary gland fascial flap. The operation is simple and the curative effect is satisfactory， providing a reference for breastconserving surgery.