Tibetan preparatory classes and preparatory classes are different in educational system and teaching content. In order to meet the needs of Tibetan students to learn Tibetan basic knowledge and cultural traditions, Tibetan preparatory classes have been set up. Its main purpose is to cultivate students' ability of understanding, reading, writing and speaking Tibetan language, so that they can better understand and inherit Tibetan culture. The educational system of Tibetan preparatory classes is 1-2 years, and students can enter secondary vocational schools or universities to continue their studies after completing the courses. Preparatory class refers to a course that helps students adapt to high school or university study. Its main purpose is to help students better adapt to the academic environment and requirements by providing some basic knowledge and learning skills. The educational system of preparatory classes can be different, some for one year and some for several months. The course content of preparatory classes usually includes the basic knowledge of mathematics, English, science and other disciplines.