To enhance the driver experience of Human-Machine Interface(HMI)in shared car,in this study,integrating the Kano model with Axiomatic Design(AD)theory,gathering the user needs through in-depth interviews and case studies,and key design requirements and optimal design parameters were derived according to HMI design principles and specifications.A design scheme for the shared car HMI was proposed across three dimensions:functional,interactional,and visual layers.Evaluation data revealed that the score of the designed scheme's SUS(System Usability Scale)usability test reached 80.225,achieving an A-level rating.It is a significant improvement compared to the current market's mainstream shared car.The result showed that the combined Kano-AD design approach effectively captures and prioritizes user needs,generating design parameters that provided designers with deeper and more comprehensive analysis and decision support.This enables the creation of more scientifically crafted design solutions and offers fresh insights for automotive HMI product development.