With the rapid development of the era of big data, according to the requirements of students' core literacy development and middle school English curriculum standards, improving English classroom teaching efficiency and reducing teaching burden have become the focus of classroom teaching reform research. The cooperative learning mode between teachers and students has always been advocated in junior high school English teaching, because However, the realization of core literacy requires students' in‐depth study and exploration. To improve students' comprehensive quality in reading teaching, we need to carry out more extensive and in‐depth teaching research and expansion. After sorting out and analyzing the data, it is found that there are some problems in junior high school English classroom teaching, such as the lack of real language situation in teaching content, the neglect of individual differences in classroom teaching activities, and the lack of flexibility and innovation in teachers' teaching design. Based on the relevant theories of classroom learning community, this paper explores the optimization strategies of junior high school English classroom teaching from the following aspects: the foundation‐laying strategy of multi‐dimensional preparation before class, the process strategy of concrete implementation in class, and the summary and reflection strategy of sublimation after class.