Loose birth canal after giving birth can be rehabilitated under doctor’s supervision to promote pelvic floor recovery. The vaginal cavity enlarges after delivery, and the vaginal wall relaxes and muscle tone decreases. Generally in the postpartum 3 weeks when the vaginal mucosal folds will be restored, but the vagina can not be completely restored to the non-pregnant state, can be under the guidance of the doctor for postpartum rehabilitation exercises, such as pelvic floor muscle exercise and physical therapy. Mothers can be instructed to do contraction of the anus exercise, forceful contraction of the pelvic floor muscles and then relax, is conducive to the relief of the relaxation of the birth canal. In addition, the postpartum should also pay attention to appropriate rest, ensure adequate sleep, encourage breastfeeding, appropriate increase in dietary nutrition, such as more protein-rich, calorie-rich food, in order to facilitate breastfeeding should also pay attention to personal hygiene, to keep the vulva clean and dry, to observe the situation of vaginal bleeding, and those who have recovered well can be rechecked on the 42nd day postpartum.