[Abstract] From the perspective of empowerment, interactive narrative can be thought as the transfer and

execution of narrative power. Point that the diversity and complexity of the narrative path under the introduction

of interactivity puts forward a higher request for the design of context and branch points. Focus on the branch

points in the interactive narrative game Lifeline, analyze the structure of these branch points with the help

of data visualization tool Gephi and social network analysis method; use statistical analysis to calculate the

weight of branch points; use the Toulmin Model to analyze the context and study the relation of key points

and the information in the context. Found that the branch points present a mixed-linear structure; the nonzero

weight is concentrated in a few key points; and the context information of key points plays an important role in

readers’ decision making.

font-family:Arial-BoldMT, font-size:9pt, font-weight:bold, ">[Key words] font-family:FZHTK--GBK1-0, font-size:9pt, ">Interactive narrative Narrative design Narrative structure Toulmin model Digital publishing