English as a language course requires more consideration in the teaching process and is directly related to secondary school students' language ability and cultural understanding. In this pluralistic internet age, English teachers need to modify their teaching methods and apply mind maps to their teaching to lead students to explore the connections between English knowledge, and learn from elementary to the profound, so as to improve their scores and speaking ability and arouse their interest in learning. This paper briefly introduces the connotation of mind mapping, analyses the problems of English teaching in junior high school, and discusses specific applications from several aspects.