Abstract:From the theoretical perspective of knowledge co-creation, with the method of grounded theory encoding method, this paper explored the influence mechanism of enterprise-customer online interaction on new product development performance through the case analysis of 4 companies’ typical new product development projects, and thus put forward 12 theoretical propositions, and constructed a theory framework of new product development performance on enterprise-customer online interaction. The results showed that the dimensions of enterprise-customer online interaction and knowledge co-creation had significant positive effects on new product development performance; the dimensions of enterprise-customer online interaction had significant positive impacts on both introversion and extroversion knowledge co-creation, and the stronger customer’s professional ability, the more significant affects of enterprise -customer online interaction on the extroversion knowledge co-creation.