Knowledge sharing of online health community is very important to relieve the shortage of medical resources and distribution imbalance problem. Based on cognitive neuroscience, this paper analyzes cognitive evolution and decision-making mechanism of knowledge sharing among patients in online health communities, discuss subconscious influence factors that dominate patient's cognitive. Results show that perceived benefit coefficient has positive influence and perceived risk coefficient has negative influence on cognitive effects of knowledge sharing, but information absorption coefficient and information conversion coefficient have no orientation influence on patient's cognitive effects of knowledge sharing.

Cognitive Neuroscience, Online Health Community, Knowledge Sharing