Purpose/Significance To explore the depression tendency and stigma degree of the depressive online health community (OHC) users, based on the theory of planned behavior (TPB) model, to discuss the influence mechanism of user stigma on OHC participation, and to provide ideas and theoretical support for the special service of depression prevention and treatment. Method/Process Online questionnaire survey method is used to collect data, combined with TPB, coping style theory, online social support theory, self-efficacy theory to construct a theoretical model and put forward hypotheses. Structural equation modeling method and Boostrap intermediary test method are used to analyze the influencing factors and path for hypothesis testing. Result/Conclusion The majority of OHC for depression are users with mild depression tendencies. Stigma directly affects OHC participation behavior. The emotional support obtained by users participating in OHC can not replace the actual companionship needs of patients. We should give them more support and attention in real life, provide more resources and ways to help them get out of depression as soon as possible.