Building upon theories of network embeddedness and network diversification,based on the data of patent authorization from the field of Biotechnology in China,we employ the negative binomial regression model to explore the internal mechanism and applicable conditions between cooperative network embeddedness and organizational innovation performance under the constraints of strong relational embedding and structural embedding of knowledge network,and the mediating effect of technology diversification on cooperation network embedding and innovation performance.Furthermore,it explores the paths of cooperative network embedment on organizational innovation performance under the conditions of external environment heterogeneity and organizational type difference.This study shows that strong and weak relationship embeddedness of cooperative network have positive effects on innovation performance,and the relationship between structural embeddedness of cooperative network and innovation performance presents an inverted U-shaped curve.Strong relational embeddedness of knowledge network negatively moderates the effect of strong relational embeddedness and structural embeddedness of cooperative network on innovation performance,while the negative moderating effect between weak relational embedding and innovation performance is not significant.Structural embeddedness of knowledge network positively moderates the relationship between weak embeddedness of cooperative network and innovation performance.Besides the direct effect,network embeddedness also can influence the development of innovation performance through technological diversification.The mediation effect of cooperative network structure embedding is the most effective,followed by strong relationship embedding and weak relationship embedding.Furthermore,this study explores that the relationship between cooperative network embedding and innovation performance varies by regional economic development level and organization type.The research results enrich the scenario mechanism of the influence mechanism of cooperative network embedding,and provide a new idea for organizations to solve the innovation dilemma by using cooperative network embedding.