The article introduced the microcomputer principle CAI class design, the CAI class is through the Authorware tool software design and the realization. It based on the chart sign visual programming method, has used the multimedia design technology, has realized the hypothesis as well as with the DOS mutual cut goal which the text documents input and the demonstration, music document transfer, responds alternately. From took one kind of convention classroom instruction supplemented the method the angle carries on the design, User contact surface artistic, succinct, the operation is simple, the enormous stimulation student has studied initiative and enthusiasm. causes in the teaching to attend a lecture, the examination effectively, natural merging into one organic whole.