Abstract:The comprehensive utilization of construction waste represents a critical aspect of establishing and improving green and low-carbon circular economic systems. Indeed, it is imperative to recycle construction waste in order to foster sustainable urban development. In this study, we focus on recycling enterprises and concrete enterprises as research subjects and analyze the strategic choices of collaborative innovation under both market regulation and government regulation mechanisms. Through numerical simulation, we validate our findings, which demonstrate that: (1) The willingness of concrete enterprises to participate is the key factor in achieving collaborative innovation, and the willingness of recycling enterprises to participate is higher than that of concrete enterprises. (2) Under both mechanisms, the likelihood of both parties choosing the "active participation" strategy is positively correlated with income growth rate and reputation income, and negatively correlated with cost growth rate and free-ride income. (3) Under the government regulation mechanism, the likelihood of both parties choosing the "active participation" strategy is positively correlated with the cost subsidy coefficient. Government participation in the collaborative innovation game raises the critical value of free-rider income impact on system evolution and increases the possibility of cooperation. Our research findings provide critical theoretical guidance for promoting collaborative innovation among construction waste recycling entities.