1, open. This is the most basic feature of distance education. Conventional school education is closed, which shows that educational resources are closed in the campus, the threshold of education is raised, and those who receive education are always a few elites in society. Distance education is open to the public. For learners, the threshold of education is lowered, the opportunities for receiving education are greatly increased, and educational information resources are shared. Distance education is born in response to the educational needs of the public. The fundamental purpose of distance education is to provide educational opportunities for all those who are willing.

2. Extensibility. This is the functional feature of distance education. Regular school education gathers learners in a specific campus from all directions, and educators carry out educational activities for them under certain institutional arrangements. This is a form of education in which educational resources and functions are contracted and concentrated. On the contrary, distance education transmits educational information to learners in all directions, and transmits educational information to the outside with the help of various media technologies, which is actually to spread educational resources and educational functions to the outside. It is through this diffusion that distance education extends its educational function to the whole society. This extension is in line with the concept of lifelong learning in modern education.