在大学英语四级考试中,作文是检测学生英语综合能力的有效手段,但学生在写作部分失分过多,为此,如何提高学生的CET-4写作水平就成为亟待解决的重要问题。本文提出在写作互评互改模式中介入衔接知识,并通过实验研究表明,学生在学习衔接知识之后,写作评改能力和写作水平都有了显著提高。 In CET-4, composition is an effective measure to detect students ’comprehensive ability in English. However, students lose too much part in writing. Therefore, how to improve students’ CET-4 writing has become an urgent problem to be solved. This paper proposes to intervene the knowledge of convergence in the mode of mutual assessment of writing, and through experimental studies, it shows that after learning the linking knowledge, students’ ability of writing assessment and writing has been significantly improved.