企业间伙伴选择的相关研究多关注行动者参与合作所能获得的信任、互惠和成本降低等积极影响，却较少考虑伙伴选择过程带来的负面影响。本文引入分裂断层概念，认为“成员间共享经验的程度差异而产生的整体网络内部分化倾向”会阻碍网络成员间的知识共享，并且这种负面作用会随着企业嵌入于网络中的位置和相对权力的不同而存在差异。以汽车产业、电子信息产业等市场化程度较高、技术创新和合作发明专利比较频繁的行业为对象进行问卷调研，运用分层回归模型验证所提假设。研究结果表明，分裂断层对网络成员间的知识共享具有显著的负面影响，但对不同网络成员的影响存在差异。占据网络中心位置的企业能够缓解分裂断层带来的负面作用，而较高的知识权力赋予网络中心位置企业更强的影响力和控制力，从而能够更大程度降低分裂断层对知识共享带来的负面影响。研究结论有助于更深刻地理解技术创新网络中的知识流以及不同企业的差异化学习行为。

The study on the choice of inter firm partners focuses on the positive effects of the trust, reciprocity and cost reduction of the actors participating in the cooperation, but seldom considers the negative effects of the partner selection process. This study introduced a concept of divisive faultlines, assume“the overall network internal division tendency based on differences in the extent to which members have shared experiences” can hinder the knowledge sharing between network members, and the negative effect is different as network position and knowledge power is different. We survey enterprises with automobile industry, electronic information industry and equipment manufacturing industry, which is highly marketable and frequently technology innovation and joint application patents, using hierarchical regression model to analyze data. The results show that, divisive faultlines has a negative effect on knowledge sharing between network members, but the influence of different network members is different. Firms in network centric position can reduce the negative effects of divisive faultlines, and the higher knowledge power can put centric position firms stronger influence and control, to further reduce the negative effects of divisive faultlines on knowledge sharing. The results will contribute to further understanding the knowledge flow and learning behavior of different enterprises in technological innovation network.