Educational information belongs to social information. Social information mainly refers to the information transmitted and exchanged between people in society. Education is an activity to cultivate people, and it pays attention to social information. To understand the source of educational information, we must first understand the main ways for human beings to obtain information. The main ways for us humans to obtain information include not only direct contact with things to obtain information, but also indirect understanding of things from information bodies. Accordingly, the sources of educational information are similar, mainly including three sources: first, teachers directly provide educational information, which he conveys to students through word of mouth; second, educational information comes from objective things, such as students' observation, experiment and practice in nature and social life, in order to obtain real perceptual information. The third is the teaching information body, which is not the thing itself, but the material carrier carrying educational information.