The work aims to meet the complex travel needs of elderly users with limited mobility and improve the comfort of electric scooter tools during use. On the basis of traditional electric scooters for the elderly, an auxiliary standing structure was added to innovate in the design of a new type of electric scooter that could be used for both sitting and standing. With the help of Jack simulation software, the comfort, accessibility, and visibility of elderly users in sitting and auxiliary standing support states, as well as the stress on the lower back of L4/L5 during the boarding process, were analyzed to verify the rationality and comfort of key human-machine interaction structures and size designs. Through verification and adjustment, the initial design scheme of electric scooters has been improved. The optimized scheme provides a reference for the design of electric scooters for the elderly, which can meet the complex travel needs of elderly users and improve the comfort and safety of electric scooter tools during use.