国际形势复杂多变使知识产权成为国家发展的战略性资源和国际战略博弈的核心领域，创新成为企业出海过程中维持长期竞争优势的关键。既有文献主要探讨了国内专利诉讼与企业创新之间的关系，缺乏跨境背景下的探索。本文基于知识基础观，以2013年至2022年间292家总部在亚洲和欧洲的高科技上市企业为研究对象，使用负二项回归分析方法剖析了海外专利诉讼与被诉企业创新绩效之间的关系。研究发现，海外专利诉讼数量与被诉企业创新绩效之间呈现倒U型关系；母国和东道国之间知识产权保护距离的增加会使倒U型关系变得更加陡峭，但随着被诉企业诉讼经验多样性的增加，倒U型关系将变得平缓。研究指出海外专利诉讼一方面会带来限制被诉企业对专有知识的使用的知识独占效应，但另一方面给被诉企业不经意间带来了有价值的知识溢出效应，补充了跨境情境下的相关研究，为“走出去”企业在应对海外专利狙击后如何实现知识获取和创新产出的最大化提供了指导。

   The complex and dynamic international landscape has elevated intellectual property (IP) to a strategic resource for national development and a focal point in international strategic competition, while innovation has become crucial for enterprises to maintain long-term competitive advantages in their global expansion. Existing literature predominantly focuses on the relationship between domestic patent litigation and corporate innovation, with limited exploration in cross-border contexts. Based on the knowledge-based view, this study selected 292 publicly listed high-tech enterprises headquartered in Asia and Europe from 2013 to 2022 as research objects and used the negative binomial regression analysis to investigate the relationship between overseas patent litigation and the innovation performance of accused enterprises. The findings revealed an inverted U-shaped relationship between the number of overseas patent litigations and the innovation performance of the accused enterprises. This inverted U-shaped relationship becomes steeper with increasing IP protection distance between home and host countries but flattens with greater diversity in the litigation experience of the accused enterprises. The study highlighted the dual effects of overseas patent litigation: a knowledge appropriability effect that restricts the accused firms′ use of proprietary knowledge and a knowledge spillover effect that inadvertently transfers valuable knowledge to the accused firms. This research has enriched the literature by supplementing research in cross-border contexts and it will provide guidance for "going global" enterprises on maximizing knowledge acquisition and innovation output when facing overseas patent attacks.