In English learning, good reading ability is very important. In recent years, the scores of students' reading ability in the college entrance examination have also increased. However, in many cases, even though students can understand the vocabulary and syntax of the text, they still cannot correctly grasp the main point of the text. They are easily immersed in the details of the text and cannot grasp the key content. There is a certain relationship between English reading and schema theory. The more complete a student's schema, the more targeted and efficient the processing of text materials. Therefore, high school English teachers should make full use of schema theory to improve teaching strategies, and focus on the development of students' schemata, so as to enhance students' English reading ability and information processing ability.