Chang 'an High School includes two high schools directly under the city and five district high schools. Among them, the high schools directly under the city are Chang 'an No.1 Middle School and Chang 'an No.2 Middle School in Xi City, and the district high schools are Chang 'an No.3 Middle School, Chang 'an No.4 Middle School, Chang 'an No.5 Middle School and Chang 'an No.6 Middle School.

Senior high school is a higher education institution after the end of nine-year compulsory education in China. It accepts qualified junior high school graduates, and the general academic system is three years, that is, senior one, senior two and senior three.

China's high school education refers to the high school education after junior high school, including: ordinary high schools, vocational high schools, secondary specialized schools, secondary technical schools and so on. It belongs to the category of high school education. Senior high school education in China is non-compulsory, and students must pay necessary tuition and other fees. Since 2009, the state has implemented the tuition-free policy for senior high schools in some poor areas.

Teaching mode:

Comprehensive senior high school is a teaching model of comprehensive talents, which is supplemented by providing students with continuing education and employment and cultivating students with solid basic cultural knowledge and certain professional skills standards. Its main feature is to recruit students according to major categories, adopt ordinary high school textbooks for cultural courses, and allow them to be diverted to vocational secondary schools after one or two years, and students' internships are completed in winter and summer vacations.

Students have mastered the knowledge level required by ordinary high school education, and after passing the graduation examination, they can theoretically engage in social work directly. At the same time, because high school education provides many theoretical tools suitable for further study, it is convenient for students to continue to receive higher education, so it is also considered a reasonable way to go to college after graduating from high school. Ordinary high school graduates can take the college entrance examination and go to college for further study.

Students who have not been admitted to ordinary colleges and universities will retain their status as students in secondary vocational schools and continue to complete the fourth-year vocational and technical education courses, which meet the graduation conditions. Secondary vocational schools issue secondary vocational school graduation certificates uniformly printed by the Provincial Department of Education, and can participate in the separate entrance examination for higher vocational education in ordinary colleges and universities organized by the provincial education administrative department.