Students’ discourse coherence has always been a topic that is often discussed in writing. For intermediate-level students with the purpose of taking exams, discourse coherence is also an important part of writing. Based on the students’ discourse analysis, this paper obtains the frequency of students’ use in the second language writing process, and uses the form of interviews to study the thinking of students’ writing process. The results of the study found that students at the intermediate level use reference and conjunction much more than the other methods, as others students at the advanced level. However, substitution and ellipsis devices are almost missing in their writing. Such results may be influenced by the test-oriented writing teaching mode in the second language writing class, which will increase the huge difference and partial loss between the different methods used by students. Therefore, in second-language writing teaching for intermediate-level students, teachers can modify the classroom according to the current problems of students.