1. It is timely and necessary to put forward the idea of popularizing high school education under the situation that nine-year compulsory education has been fully popularized in China and the gross enrollment rate of high school education has reached 86.5%. How to understand the popularization of high school education has naturally attracted people's attention and discussion. 2. Universal education, free education and compulsory education are closely related and completely different. Universal education is the development goal of education, and it is also the historical requirement of continuous improvement in the process of educational development. In the early days of the founding of New China, China put forward the goal of universal primary education (three to four years), and later put forward the goal of universal primary education. During the Great Leap Forward, China put forward the goal of popularizing junior high school and even senior high school education. For a time, every village had primary schools, teams had junior high schools and social organizations had senior high schools. Even teachers who haven't graduated from primary school have taught junior high school and senior high school. Enthusiasm replaced science, and quantity overwhelmed quality. Later, they made great efforts to reduce digestion. Therefore, what level of education should be popularized and to what extent should be decided according to historical conditions. Free education is a policy measure and an important livelihood welfare. 1985 China proposed to implement nine-year compulsory education, and 1986 compulsory education law was promulgated, but in 2008, China really realized free compulsory education in urban and rural areas. Compulsory education is an institutional arrangement and a mandatory legal provision. Compulsory education has two basic characteristics: free and compulsory, and tuition exemption is the basic guarantee for the implementation of compulsory education. Without free education, it is difficult to ensure the implementation of compulsory education and to spread it to every child. The central and local governments exempt tuition and miscellaneous fees and help children from poor families to finish their studies smoothly, which is the guarantee for the full realization of compulsory education; At the same time, compulsory education is compulsory, and all parents are obliged to send their children to school. So we say that compulsory education must be free and universal, and vice versa. 3. Ordinary high schools and vocational high schools are the main components of high school education. Universal high school education is the abbreviation of universal high school education, which mainly includes ordinary high schools, vocational high schools and secondary technical education. Since the beginning of 2 1 century, according to the needs of social development and talent structure adjustment, China has put forward the goal that general education is roughly equivalent to vocational education in order to continuously improve the employment level of young people and vigorously develop vocational education. At the same time, the investment in vocational education is increasing, the reform of vocational education is deepening, the quality of vocational education is improving, and the attraction of vocational education is increasing. 4. Both public schools and private schools have made important contributions to the development of high school education. The popularization of high school education does not mean the popularization of public education. It is also an important content to mobilize the resources of the whole society to promote the development of private high schools and meet the aspirations of different groups of people to receive high school education. The Outline of the National Medium and Long-term Education Reform and Development Plan emphasizes: "Private education is an important growth point of education development and an important force to promote education reform. Governments at all levels should take the development of private education as an important job responsibility, encourage investment and donations to run schools, and promote social forces to set up education in various forms such as independence and joint ventures. " In fact, private education has also played an important role and made important contributions in the popularization of high schools in China. Constantly improving the environment of private education, increasing the support for private education and strengthening the management of private education are also the inherent requirements for popularizing high school education.