本文从言据性的主体性出发,结合突发事件新闻发布会的危机语境特殊性,考察发言人话语中言据性的认知立场和相关语言特征,借助Spencer-Oatey“和谐管理模式”解释言据性语言选择的动机及语用原则。研究认为,发言人话语中的言据性形式并不一定完全与实际信息来源相符,发言人依据危机语境下的交际目的和人际语用原则来选择语言形式,并利用言据性来协调人际交往关系。 Based on the subjectivity of speech and the particularity of the crisis context of emergency press conference, this article examines the rhetorical cognitive position and linguistic features of speaker’s discourse. With the help of Spencer-Oatey’s harmonious management model "Explain motivation and pragmatic principles of choice language. The study suggests that the formal form of the speaker’s discourse does not necessarily correspond exactly with the actual sources of information. The spokesperson selects language forms based on the communicative purposes and interpersonal pragmatic principles in a crisis context, and uses rhetoric to coordinate interpersonal Relationship.