This study explores the application of large language models in ideological and political education within college English writing courses, aiming to establish a new teaching model for such courses. Taking Unit 3, “Crime and Justice,” from the textbook University Critical Thinking English Tutorial: Writing 3 as an example, the paper analyzes the implementation pathways of teaching processes facilitated by large language models, integrating ideological and political education elements across the three phases of “pre-class, in-class, and post-class.” It is found that LLM-enabled ideological and political education in English writing courses can expand the scope of college foreign language teaching theory, help cultivate college students’ English writing and critical thinking, and improve their humanistic literacy, sense of national identity, and international perspective.