Abstract: 【Purpose/significance】Information sharing and information searching are the main ways for users to participate in the on⁃line health community.In the process of participating in the online health community,users often carry out the compound information behavior of information sharing and information searching simultaneously for different purposes,to explore the factors that influence us⁃ers to carry out the two behaviors simultaneously is helpful for online health community to grasp users' needs accurately and further op⁃timize the service strategy【. Method/process】Taking the online health community users as the research object,this paper constructs the influencing factor model of online health community users' willingness to share and search information through self-determination
theory and TAM model.We collected data by issuing questionnaires and verified the hypotheses by using structural equation model.【Result/conclusion】The study found that health anxiety has a significant positive impact on information search intention.Perceptual relationship has a significant impact on the willingness to share information.In addition,users' information sharing intention positively affects their information search and sharing behavior,while users' information search intention significantly affects their search behav⁃ior,it has no significant impact on information sharing behavior【. Innovation/limitation 】The theoretical framework of the research on the information behavior of online healthy community users is improved,which provides a new perspective for the research on the be⁃havior of online healthy community users.In the future,related research will carry on the deeper discussion to a specific community user.