Abstract: Major cause of conflict in product collaborative design is the lack of an effective knowledge organizing, sharing, and communication, collaboration between the subjects of knowledge. To solve knowledge conflict in garment product collaborative design, the concept of knowledge conflict and knowledge collaboration is defined, and knowledge feature of garment design is analyzed. The collaborative knowledge organization model for garment collaborative design is built, and an integrated conflict resolution method based on knowledge reasoning and push is presented. Based on the above, the system of conflict resolution based on knowledge collaboration in garment collaborative design is presented, and an example to descript application is given.