中文摘要：

基于开放式服务创新的多主体性，探讨平台生态系统中平台型企业与各创新主体搜寻异质性创新知识的行为，从合作伙伴类型的视角提出技术型、商业型、技术一商业整合型三种跨界搜索模式。最后通过分析百度平台的案例发现，平台型企业作为生态圈领导者，根据创新知识分享、价值创造、社会关系特点选择相应的跨界搜索模式，有助于创新知识流动和创新资源整合．提高服务创新绩效，建立长期稳定的跨界合作机制。

英文摘要：

Based on open service innovation with muhi-participators, the paper discussed the behavior of platform enterprises and other subjects searching for heterogeneous innovation knowledge in the platform ecosystem. Then it proposed three different transboundary search modes according to different cooperation partners, including the technology-based mode, the business-based mode, and the in- tegrated mode. At last, by analyzing a case on Baidu platform, the paper concluded that as leaders of the whole ecosystem, platform enterprises should choose a transboundary search mode according to characteristics in sharing of knowledge, creation of value and social relations. This not only helps the flow of innovation knowledge and the integration of innovation resource, hut also improves the perform- ance of service innovation, which will lead to a long-term, steady mechanism of cross-border cooperation.