[Purpose/significance] This study aims to explore the formation mechanism of the elderly's negative use of online health information services, and to provide reference and suggestions for the operation and management of online health platform.[Method/process] Using the "Cognition-Affect-Conation" paradigm, combined the cognitive load theory and the perceived value theory, this study explored the mechanism of anxiety and avoidance and withdrawal behaviors of elderly users of online health platform, and explained the influence mechanism between the elderly's perception of emotion, expression of emotion and negative behavior results.[Result/conclusion] The results showed that the perceived cost, information overload and service overload have obvious positive effects on the anxiety of the elderly, and the anxiety causes the negative use behavior intention of the elderly to avoid and quit, while the perceived risk and system overload have no significant effects on the anxiety of the elderly.