One and a half year old baby rotund leg correction should be carried out according to its etiology, commonly including physiological and vitamin D deficiency and other pathological causes, can be corrected through medication, supports and so on. 1. Physiological: some one-and-a-half year old babies with mild rotator cuffs are physiological, and can be corrected by themselves as they grow older, with regular follow-up, often without special treatment. 2. Pathological: some babies can be caused by vitamin D deficiency rickets and other pathological reasons, can be treated and orthopedic correction. For example, vitamin D and calcium supplements (such as calcium carbonate, etc.). At the same time, orthopedic braces can be worn for correction. In a few cases, corrective surgery may be indicated. It is recommended to consult a doctor in time for diagnosis and treatment, and the above drugs should be used under the guidance of a doctor.