This article focuses on the visual language of digital media, and theoretically elaborate and refine its characteristics. According to the perspectives of the cognitive subject and audience relationship of visual language, the relationship between the expression symbol and the reference object, the visual language expression form, etc., the characteristics of interactivity, virtual reality, visual multidimensionality, static image dynamics and other characteristics are extracted. And on this basis, especially on the basis of interactive and virtual reality features, deduced digital design methods such as computing graphics, digital colors, graphical layout and so on.