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As the population continues to age, the daily lives of those with disabled lower limbs have gradually become an unavoidable social welfare problem. Based on an investigation and analysis into the daily routines of the elderly with partial disability in their lower limbs, the product design experiment is proposed to solve any mobility difficulties in the elderly with partial disability in their lower limbs to provide practical help that can ensure their independence and social contact. Based on the literature research and market comparison, According to the assessment criteria for the Instrumental Activity of Daily Living Scale (IADL), the physiological functions and user behaviors of this elderly population were investigated, and the actual needs for outdoor walking were analyzed. The idea of focusing on auxiliary tools for the elderly with lower limb disability was proposed, and a tool to aid in short-distance travel was designed for this target group to improve their IADL travel index and optimize their mobility.