After giving birth to a baby, the loose stomach is related to the separation of the rectus abdominis muscle and the relaxation of the fascia, which can be tightened through the rectus abdominis muscle function exercise, wearing a harness, laser and radiofrequency treatment, etc. The skin can be tightened through the rectus abdominis muscle function exercise. 1. Rectus abdominis function exercise: need to strengthen the postnatal exercise, enhance the function of rectus abdominis muscle, enhance the fascial tension, can be gradually recovered. It is recommended to do sit-ups, push-ups and other exercise after the postpartum recovery, but also jogging, swimming, fitness. 2. Wear a harness: the harness is conducive to the rectus abdominis muscle alignment, increase the rectus abdominis muscle function, help to restore the belly flaccid. 3. Laser radiofrequency treatment: belongs to the medical treatment, can stimulate the skin as well as the subcutaneous tissue contraction, restore the belly of the tight state.