Unsteady walking at one and a half years old may be due to physiological factors, or cerebral palsy, hip dysplasia and other factors. It is recommended to go to the hospital for examination and treatment after clarifying the cause. 1. Physiological factors: One-and-a-half year old children walking unsteadily are often due to physiological factors, which can be improved with more exercises. 2. Cerebral palsy: Children with cerebral palsy may have unsteady walking due to delayed brain development and changes in muscle tone, which may lead to poor support of both lower limbs. Rehabilitation training can be carried out under the guidance of specialized physicians, and surgical treatment can be carried out if the symptoms are serious. 3. Hip dysplasia: Hip dysplasia may cause limitation of hip joint activities and atrophy of lower limb muscles, which may lead to the symptoms of unsteady walking and weak legs. It can be treated conservatively with stent fixation, and if conservative treatment is ineffective, surgery is often needed to correct the problem. In addition, it may also be due to the baby is more timid or frightened or lack of calcium and thus lead to walking instability, you can often take the baby out for a walk, more sunshine, supplement cod liver oil, etc., try to avoid the baby fall.