English children’s literature, as an important resource for elementary school English education, has distinctive regional, national and multicultural characteristics. This study adopts the LDA theme model to mine the themes of English children’s literature since the 1970s, and verifies its teaching effect through a semester-long teaching experiment. The results show that the themes of English children’s literature can be summarized into four categories: love, romance, growth and pursuit; after the introduction of English children’s literature, the English writing scores of students in the experimental class increased from 62.18±5.87 to 81.64±3.76, and the total number of words in writing increased from 98.54 to 132.85, whereas those of the control class only increased from 62.27±6.81 to 64.76±5.94 points; the mean value of English learning interest of the students in the experimental class increased from 2.15 to 3.28 points, and the vocabulary learning interest, reading learning interest and classroom participation motivation increased significantly (p<0.05). Conclusion: The thematic distribution of English children's literature based on statistical model mining provides a scientific basis for the selection of educational content; the targeted integration of English children's literature into elementary school English teaching can effectively improve students' English writing ability and learning interest, and promote the quality of elementary school English education.
