By combining the social exchange theory, social support theory and trust theory, an integrating model has been built to study the factors influencing the continuous knowledge contribution intention of users in online health community. The paper conducts questionnaire survey to analyze and review the theories proposed, and the results show that the trust in users poses positive influence on the trust towards community, which then has remarkable positive influence on the continuous knowledge contribution intention; while time and efforts pose remarkable negative influence on the continuous knowledge contribution intention.