Babies walking late may be related to a variety of reasons, including calcium deficiency, improper feeding and developmental delay. 1. Calcium deficiency: the disease may be caused by insufficient intake of calcium and malabsorption, etc. Calcium deficiency in infants and young children may result in delayed development of gross motor movements such as walking, sitting and standing, as well as anorexia, night sweating, alopecia, late teething and other symptoms. 2. Improper feeding: infants and young children’s large motor development has a certain pattern to follow, in the development of infants and young children in the process of providing a suitable environment, and timely guidance, 9 ~ 10 months the baby can practice supporting the station, 11 ~ 12 months according to the development of the baby gradually practicing walking, generally no later than 18 months. Parents who do not feed their babies properly may experience late walking. 3. Developmental delay: the disease is related to genetic, endocrine and other factors, infants and young children with the disease may appear physical development, motor development, intellectual development and other aspects of backwardness, resulting in babies one and a half years old is not able to walk independently. There are many factors that cause babies to walk late, it is recommended to consult a doctor in time for a clear diagnosis, timely and targeted treatment, so as not to miss the opportunity for treatment.