How long can breast reconstruction be done after breast cancer surgery? If radiotherapy is carried out, it should be one year after the end of radiotherapy, because the damage to skin tissue caused by radiotherapy is still relatively large, and if chemotherapy is carried out, it should be six months after the end of the last chemotherapy. Generally speaking, delayed breast reconstruction can only be performed two to three years after primary breast cancer surgery. Therefore, the best period is these two. Early breast cancer patients should have breast reconstruction surgery as soon as possible, and unsuitable patients should wait six months to one year after breast cancer surgery and chemotherapy, that is, almost three years after surgery.