As the law of language use, grammar guides the application and practice of language.A strong foundation in grammar improves reading and writing skills. Therefore, mastering grammar skillfully plays a positive and effective role in improving students’ language ability. However, the current English grammar teaching in senior high schools in China faces many problems. First of all, the necessity of grammar teaching has been ignored to some extent. In practical teaching, most teachers prefer to let students constantly expand their vocabulary, and pay more attention to grammar; Secondly, although some teachers have a certain understanding of the importance of grammar, it is difficult to organize teaching activities scientifically, resulting in the situation that students’ enthusiasm for learning grammar is not high and grammar is difficult to learn.