本文旨在深入分析汉语口语交际中的话语标记“不是我说”及其在语境构建中的多功能性。通过关联理论和会话分析理论的框架，本研究揭示了“不是我说”在认知语境引导、社交语境协调和语言语境衔接方面的重要作用。研究发现，该话语标记能够有效激活听者的背景知识、引导推理过程、维护人际关系、明确角色关系，并确保话语流程的连贯性和信息焦点的凸显。通过对北京语言大学 BCC 语料库和北京大学 CCL 语料库中的海量语料进行分析，本研究从宏观和微观两个层面全面揭示了“不是我说”在语境构建中的关键效用。本研究不仅丰富了对汉语口语中话语标记功能的认识，而且为跨文化交流、语言教学和语料库建设等领域提供了理论支持和实践指导，展现了“不是我说”在汉语口语交际中不可或缺的作用。

This paper aims to analyze the discourse marker "not I say" in Chinese oral communication and its multi-function in context construction. Through the framework of relevance theory and conversation analysis theory, this study reveals the important role of "not I say" in cognitive context guidance, social context coordination and language context cohesion. It is found that the discourse marker can effectively activate the background knowledge of the listener, guide the reasoning process, maintain the interpersonal relationship, clarify the role relationship, and ensure the coherence of the discourse process and the highlight of the information focus. Through the analysis of the massive corpus in the BCC corpus of Beijing Language and Culture University and the CCL corpus of Peking University, this study comprehensively revealed the key effectiveness of "not I say" in the context construction from two levels of macro and micro. This study not only enriches the understanding of the discourse marker function in oral Chinese, but also provides theoretical support and practical guidance for cross-cultural communication, language teaching and corpus construction, and shows the indispensable role of "not I say" in oral Chinese communication.