Abstract:An interactive mechanism model based on the hyper-marginal analysis method is constructed.It is found that the increasing level of specialization in the roundabout production process promotes the accumulation of knowledge and promotes the continuous emergence of new machines and new technologies; In turn, the innovation and technological diffusion generated by the accumulation of knowledge can broaden the boundaries of roundabout production and promote the development of roundabout production.The interaction mechanism between roundabout production and knowledge accumulation is analyzed,and , it can be found that strengthening the interaction between roundabout production and knowledge accumulation by improving transaction efficiency, giving full play to the leading role of leading enterprises within the cluster, and improving the level of human capital are inevitable choices to further expand the space for increasing returns in industrial clusters.