First, multimedia is a combination of text, graphics, images, sound, animation, movies and other means of information dissemination, which has a strong sense of reality and expressiveness. It can stimulate and improve students' interest in learning, is the premise of improving teaching quality, is an important part of improving classroom teaching environment, and helps to mobilize students' enthusiasm for learning.

The second is to use multimedia functions such as man-machine dialogue, friendly interface, hypertext, artificial intelligence, editable tools, convenient peripherals and virtual reality.

Third, we can turn the abstract into concrete, simulate the reactions and phenomena in the micro-world, make teaching more vivid and intuitive, and make it easy for learners to understand and master. For example, in the section of "pyramid volume" in mathematics teaching, the cone column is cut into three triangular pyramids with equal bottom and equal height, and the sum of their volumes is the volume of the triangular prism. The conclusion is that the volume of a pyramid is one third of that of a prism with a constant bottom.

Fourthly, various information transmission means of multimedia act on learners, which can mobilize visual, auditory, oral and other senses at the same time to form a reasonable teaching process system. Make learners learn in the best learning environment and achieve the best teaching effect.

Fifth, multimedia network can shorten the distance between time and space and strengthen the connection between people. It is conducive to broadening learners' horizons and forming excellent qualities of mutual assistance and cooperation. For example, electronic library and network services allow users to pass information to other users of the system, and also obtain library information through computers. Its benefits are self-evident.