Reading teaching is the main task of English teaching in China. The discourse analysis teaching method is based on the textual structure of discourse and the cohesion and coherence of the article. It guides students to analyze the discourse from the macro structure and microstructure, and can cultivate students' ability to acquire and analyze information as a whole, and improve students. Reading efficiency. With the rapid development of multimedia network technology, English reading also faces a "technical revolution." Fully integrating English reading teaching with multimedia network technology, changing the traditional English reading classroom environment and enriching the means of information input can help to fully stimulate students' reading enthusiasm. This paper takes multimedia as the background and relies on the theory of discourse analysis, combined with teaching practice, to study the effect of multimedia-assisted discourse analysis teaching method in English reading teaching. This paper firstly demonstrates the feasibility of combining multimedia and discourse analysis as a means of English reading teaching, and systematically designs the implementation of the discourse analysis teaching method from the theoretical level, and then takes two classes as subjects. Empirical Research. The experimental class uses the multimedia-assisted discourse analysis teaching method for reading teaching, while the control class still uses the traditional reading teaching method. Compare the pre-reading and post-test scores of the two classes and the questionnaires before and after the experiment, and analyze the influence of the discourse analysis teaching method on solving the reading comprehension obstacles of the grade students. The experimental results show that the multimedia assisted discourse analysis teaching method significantly improves students' English reading performance. Therefore, this paper believes that the purpose of introducing multimedia-assisted discourse analysis teaching method into English reading teaching with a purpose and plan is more popular among students.