Baby rotund legs may be physiological factors, obesity, calcium deficiency, walking posture is not correct, etc., can be improved through weight loss, massage, splinting, correction of walking posture, calcium supplementation and other ways to improve the treatment. 1. Physiological factors: babies within 1 week of age, there is no need to worry too much. However, it is recommended that parents do not let their babies stand and walk too early, and use walkers less often to reduce the stimulation of external forces on the legs. 2. Weight loss: if the baby weight is heavy, standing, walking will increase the burden on the lower limbs, for excessive obesity has seriously affect the health of the baby, should be appropriate weight loss. 3. Massage: let the baby lie flat, hands on the baby’s joints, to the joint deformity in the opposite direction of gentle massage, avoid excessive force. Repeatedly, three to five times a day is recommended. 4. Correct walking posture: pay attention to correcting the baby’s walking posture, walking must not walk outside the eight walk, and pay attention to correcting the baby’s sitting posture. 5. Calcium supplement: you can let the baby eat more calcium-rich foods, such as milk, soy products, etc., but also oral calcium gluconate, calcium carbonate and so on. For babies who fail to improve or even aggravate for a long period of time, it is recommended to seek timely treatment in the hospital.