The paper begins with the concept and ideas of multimedia teaching and computer-aided multimedia teaching, illustrates the principles of optimal integration between computer-aided multimedia teaching and traditional teaching, stresses how to balance the relationship between the learners and the teacher and how to benift from the teaching process, all these have just been shown with the figures and been developed by taking translation teaching as the sample, and the constructivist theory of scaffolding instruction has also been adopted as the theory basis, espeiclly to the the design, the Organization and the implement of the multimedia assisted translation teaching.