Abstract:s: The inter-organizational improvisation of supply chain members plays an important role in cooperative innovation. Through empirical research, it is clarified that the influence of supply chain network routines and network power on inter-organizational improvisation, meanwhile the mediating role of inter-organizational improvisation between network routines, network power and cooperative innovation performance of supply chain is examined. The results show that the specification consensus dimension of supply chain network routines has an inverted U-shaped impact on the inter-organizational improvisation and cooperative innovation peformance. The tacit understanding dimension of network routines and network power have positive impacts on the inter-organizational improvisation and cooperative innovation performance. Inter-organizational improvisation plays a part of medium role in the influence of network routines and network power on cooperative innovation performance of supply chain. The research provides guidance for improving firms’ cooperative innovation performance in the supply chain.