马克·吐温是美国批评现实主义文学的奠基人,著名的幽默大师,善于运用幽默语言,批判生活中的丑陋现象。小说语言幽默与预设紧密相关,预设是说话者假定存在的一种信息或命题,是交际的前提,具有合适性、主观性与可取消性的特征。通过预设理论,解析马克·吐温小说中语言幽默的生成机制,有助于提升对小说幽默的认知。 Mark Twain, the founder of the criticism of realism in the United States and the famous master of humor, is good at using humorous language to criticize the ugly phenomena in his life. Novel language humor is closely related to the default. Presupposition is a kind of information or proposition assumed by the speaker. It is the premise of communication, and has the characteristics of suitability, subjectivity and derogability. Through the presupposition theory, it is helpful to analyze the formation mechanism of the language humor in Mark Twain’s novels to enhance their cognition of the novel’s humor.