Abstract: Users low willingness of continuous knowledge sharing is one of the important problems that perplexes the non-transactional virtual communities. It is urgent to study the relationship among users and how to maintain the relationship for a long time. Therefore, the theory of co-dependence in psychology is introduced and the impact of co-dependence on users willingness of continuous knowledge sharing is explored in two modes. The results show that co-dependence can more directly explain the relationship among users, and has a significantly positive impact on user loyalty and their willingness of continuous knowledge sharing, and user loyalty partially plays a mediating role in it. Finally, according to the research results, the operation suggestions and research prospects are analyzed and proposed, in order to provide reference for the operation of non-transactional virtual communities and related research.

Key words: non-transactional virtual community, co-dependence, knowledge sharing, loyalty