The size of breast is not related to health, but may be related to work, social life and quality of life. Under the current aesthetic concept of women, some breast cancer patients have difficulty adjusting to their psychological and emotional state after mastectomy, and may mind losing their breasts. These breast cancer patients can discuss with their breast surgeons and choose whether or not to undergo breast reconstruction surgery and choose the reconstruction method while making every effort to treat their breast cancer. After mastectomy, breast cancer patients with early stage breast cancer can choose to undergo breast reconstruction. After breast reconstruction surgery for breast cancer patients, it will not affect the monitoring of breast cancer recurrence. The timing of breast reconstruction for breast cancer patients can be divided into stage I reconstruction and stage II reconstruction, according to the stage of breast cancer and patient’s needs. Stage I breast reconstruction is performed after mastectomy, and is suitable for early stage breast cancer patients. The advantages of first-stage breast reconstruction are easier psychological adjustment, less hospitalization days, less post-operative pain, and savings in medical costs, as well as easier reconstructive surgery, and the appearance of the reconstructed breast is closer to that of the original breast; the disadvantage is that the surgery takes longer, including the time for mastectomy and breast reconstruction. The options of first-stage breast reconstruction surgery include artificial tissue expander, artificial breast implant placement surgery, or autologous tissue reconstruction surgery; while autologous tissue reconstruction surgery can be performed with local flap reconstruction surgery or free flap reconstruction surgery; when performing free flap reconstruction surgery, it is necessary to use microvascular anastomosis technique under the operating microscope to connect the free flap vessels. 2.Stage II reconstruction: It is performed after the general time of mastectomy, usually after the end of chemoradiotherapy and other comprehensive treatments, and is suitable for patients with early stage breast cancer or patients with advanced breast cancer without recurrence. Second-stage breast reconstruction is generally a little more difficult than first-stage breast reconstruction, mainly because of problems such as insufficient skin, scar tissue adhesions, and less choice of anastomotic vessels. The advantages of second-stage reconstruction are that it is possible to concentrate on breast reconstruction surgery without the need for postoperative breast cancer treatment (chemotherapy or radiation therapy), and that the operation time is shorter, excluding the time for mastectomy; the disadvantage is that the appearance of the reconstructed breast is less similar to the original breast appearance. The options for second-stage breast reconstruction surgery include artificial tissue expander placement followed by artificial breast implant placement or autologous tissue reconstruction surgery. Breast reconstruction surgery for breast cancer patients can be divided into reconstructive surgery with implants and reconstructive surgery with autologous tissues, depending on the stage of the breast cancer and the patient’s needs. The advantages are that the procedure is relatively simple, the operation time is short, about one to two hours, and the out-of-pocket expenses are less. The biggest disadvantage is that the size, shape, and feel of the reconstructed breast are different from the natural breast. If you choose to have an artificial tissue expander placed, you will need to return to the clinic periodically to have saline injected into the artificial tissue expander in order to adjust the size of the artificial tissue expander to a satisfactory size, after which you can receive the artificial breast implant placement surgery. Alternatively, patients may choose to undergo direct breast implant placement surgery, which is less time-consuming, but the size of the artificial breast implant cannot be adjusted. The reason for breast cancer patients to choose artificial tissue expander or artificial breast implant placement is mainly to make it easier to wear bras and clothes after surgery. 2.Autologous tissue reconstruction surgery, with local flap reconstruction surgery, or free flap reconstruction surgery The advantage of autologous tissue reconstruction surgery is that the shape of reconstructed breast is similar to natural breast, and the long-term satisfaction of breast cancer patients is higher, but the procedure is more complicated, the operation time is longer, about six to eight hours, and the out-of-pocket expenses are more. The tissues available in the body can be obtained from the abdomen, back, and with the buttocks where the fat or muscle is more developed. Currently, free flap surgery is the main choice for autologous tissue reconstruction surgery, which has a high success rate, few sequelae, and a more natural-looking reconstructed breast. Most of the free flap surgeries are chosen from the rectus abdominis muscle (TRAM) flap surgery, which has a lower rate of postoperative fat necrosis, but will sacrifice the rectus abdominis muscle and has a higher rate of abdominal hernia; or from the penetrating abdominal branch (DIEP) flap surgery, which will not sacrifice the rectus abdominis muscle, but has a higher degree of surgical difficulty than the rectus abdominis muscle (TRAM) flap surgery and has a higher rate of postoperative fat necrosis. For local flap reconstruction, the main choice is either TRAM flap surgery or LD flap surgery; LD flap surgery often requires placement of an artificial breast prosthesis under the flap due to insufficient flap volume. If radiation therapy is required after breast cancer surgery, breast reconstruction surgery is mainly based on the placement of artificial tissue expanders. After radiation therapy is completed, saline is injected regularly at the outpatient clinic to expand the breast skin, and then artificial breast prosthesis placement surgery or autologous tissue reconstruction surgery is considered. In China, the rate of breast reconstruction after mastectomy is very low, with 30% of breast cancer patients considering breast reconstruction and about 5% actually having reconstruction. In the United States, according to the American Society of Plastic Surgery 2005 statistical report, there were 57,778 cases of breast reconstruction after mastectomy, and the rate of breast reconstruction was much higher than that in China. (TRAM) flap in 9,578 cases, and a free abdominal penetrating branch (DIEP) flap in 1,909 cases. Breast reconstruction after mastectomy is covered by Medicare under U.S. law, so the rate of breast cancer patients receiving breast reconstruction in the United States is high. Basically, the treatment of breast cancer is based on the treatment of breast cancer, not on breast reconstruction, which is included in the overall treatment plan. When considering breast reconstruction after mastectomy, breast cancer patients should discuss with their breast surgeons and family members whether they have early-stage breast cancer and whether they are suitable for breast reconstruction surgery, and then discuss the timing and surgical approach. The advantages and disadvantages of the above mentioned surgical timing and surgical methods, along with statistical data, can be used as a reference when making a decision.