合作网络对创新绩效的意义已得到广泛论证，但同时考虑组织内、外部合作网络的研究相对匮乏，更鲜有文献考虑超越追赶阶段的特殊情境。基于2014—2019年国内34家超越追赶阶段后发科技企业专利数据，采用负二项回归分析方法探索组织内合作网络密度、网络规模与超越追赶阶段后发企业创新绩效的关系，以及组织间合作网络密度与网络规模对两者关系的调节作用。结果表明：组织内合作网络密度越大，企业创新绩效越低；组织内合作网络规模越大，企业创新绩效越高。进一步研究表明，组织间合作网络密度强化组织内合作网络密度对创新绩效的负向影响，而组织间合作网络密度和网络规模会削弱组织内合作网络规模对创新绩效的正向影响。

With the continuous accumulation of resources and capabilities, more and more Chinese enterprises are catching up with the leading enterprises in various fields of industry. They usually have high market shares in the domestic market, and specific advantages in some technical fields in the international market, and thus they are able to compete with industry leaders. However, in order to maintain their existing technological dominance for a long time, western developed countries represented by the United States have imposed different degrees of sanctions, containment and technological blockade on Chinese enterprises beyond the catch-up stage. Taking the United States as an example, since 1997, the United States has pulled more than 300 Chinese companies into the entity list to carry out technical strikes against China. Therefore, whether latecomers can successfully get rid of the technological blockade and achieve catch-up is of great significance to China's formation of national strategic scientific and technological strength. The catch-up process of latecomer firms depends on their innovation capability which is defined as the ability of enterprises to acquire, absorb and integrate internal and external innovation resources. Furthermore, as a channel for carrying internal and external innovation resources, the cooperation network is a key factor affecting the innovation performance of enterprises. Effective use of cooperation network can not only promote the improvement of enterprise resource capabilities and provide enterprises with valuable external resources, but also facilitate the internal digestion, absorption and sharing of resources, laying a foundation for the improvement of enterprise innovation capabilities. Therefore, this study is of great significance for latecomer firms that are endeavoring to go beyond the catch-up stage by taking advantage of cooperative network and achieve effective leverages.#br#This study selects the patent data of 34 latecomer technology firms which are from the list of the world's top 500 companies and the list of the top 100 technology companies in China. First, on the basis of the co-inventor information in the patent data, it identifies the cooperation between inventors within the enterprise and builds intra-firm cooperative networks. Second, it confirms the cooperative relationships between focus enterprises and other enterprises based on the co-owner information in the patent data, and then builds the inter-firm cooperation networks of focus enterprises. Finally, the study uses the network analysis software to analyze and calculate the density and size of the cooperative network, and then it explores the impact of the density and size of intra-firm collaborative networks on the innovation performance of latecomers beyond the catch-up stage. In addition, taking the density and scale of inter-firm cooperative networks as moderating variables, it analyzes the moderating effect of inter-firm cooperation networks on the relationship between the density and scale of intra-firm cooperative networks and the innovation performance of latecomer firms beyond the catch-up stage.#br#It is concluded that beyond the catch-up stage, the density of intra-firm cooperation networks has a negative impact on the innovation performance of enterprises, and the scale of intra-firm cooperation networks has a positive impact on the innovation performance of enterprises;beyond the catch-up stage, the density of inter-firm cooperative networks enhances the negative impact of intra-firm cooperative network density on the innovation performance of enterprises,while the density and scale of inter-firm cooperative networks weaken the positive impact of the scale of intra-firm cooperative network on the innovation performance of enterprises.#br#The conclusion of this paper is of great significance to theoretical research and practical work. First,combined with the characteristics of latecomers in the beyond catch-up stage, this paper reveals the joint influence of intra-firm and inter-firm cooperation networks on corporate innovation performance, and enriches the research on latecomers beyond the catch-up stage. Second,it enriches the research content in the field of network and enterprise innovation, and emphasizes the importance of comprehensive consideration of the organizational internal and external cooperation networks. Finally, when dealing with inter-firm cooperative relations, latecomers beyond the catching-up stage should evaluate the network structure of the intra-firm cooperative networks, clarify the strategic direction of the inter-firm cooperative networks, and manage inter-firm cooperative relations to improve the innovation performance of enterprises.#br#