Rhetorical devices such as rhyming and antithesis are used in the formula of the public examination "Wenjie" to facilitate candidates' memory and improve memory efficiency. The formula of Wenjie in public examination covers a large number of knowledge points and test sites, which can help candidates master relevant contents systematically and improve the efficiency of preparing for exams. The formula of Wenjie in the public examination adopts concise and vivid language, which is easy to understand and easy for candidates to quickly master relevant knowledge points.