Abstract: Based on the case study of Haier Group's innovation ecosystem, this paper opens a platform black box for how to coordinate the participants' participation in complementary innovation. This study analyzes the characteristics of different types of participants from the following two dimensions: resource endowment and ecosystem location. This research pays attention to the interaction process between participants and focus firm when they complement resources. We focus on the focal firm coordination behavior of prospective resourcing processes with different types of participants. This study found that ecosystem participants with different resource endowments will complement the innovation activities through responsive prospective resourcing, targeted prospective resourcing and collaborative prospective resourcing processes, while focal firm will adopt different coordination mechanisms upon different participants considering their resource endowments and locations in the ecosystem. Therefore, this study summarizes the logical relationship between the role of the participants in the innovation ecosystem, the prospective resourcing process and the matching and innovation of the focal firm coordination mechanism, and finally provides an integration framework.