Abstract:The Fifth Population Census data fully shows that China's society has fully stepped into the aging. Senile dementia is an important problem which will be faced by the society in the future, so attention must be paid to it. The work aims to explore the design method of products for dementia patients and apply it into the design practice, so as to lighten the burden of life for patients and their families. Through field investigation and comprehensive investigation of dementia patients, a large amount of survey data are collected, and the life, behavior and psychology of dementia patients are analyzed to explore the needs of the mentally handicapped from multiple perspectives in combination with existing products. The needs of the patients with dementia are obtained based on the survey data collection and analysis, and the design principles of rehabilitation aids for the patients with dementia are expounded, hoping to provide reference for the research on the design of rehabilitation aids for dementia.