本文是一项针对英语专业学生话题化行为的实证研究。话题化行为包含提出话题、接续话题、转换和结束话题等四个环节。笔者通过对所收集的十组对话加以分析,得出学生在相关环节所具有的特征,指出其与国内外前期研究所描述的特征的异同,并进而提出对英语口语课堂中会话能力训练的启示 This article is an empirical study of the topic-specific behaviors of English majors. The topic of behavior includes the proposed topic, follow the topic, conversion and the end of the topic of four links. By analyzing the ten groups of dialogues collected, the author draws the characteristics of students in relevant aspects, points out the similarities and differences between them and the characteristics described in previous studies at home and abroad, and then puts forward the enlightenment to the training of conversational ability in oral English classes