The relationship between social media communicators and audiences is not divergent or relatively decentered.However，there exists a stratification and differentiation based on its online fans number，post activity and initiative interaction level.According to the 40752 posts and 347658 comments on Sina micro-blog and their corresponding relation and conversion matrix，it shows that a certain level of communicators are more likely to get the same or similar discourse level audience to make comments and feedback，a certain level of the audience is more likely to make comments and feedback on the same or similar discourselevel communicator.The homogenization of social media does not directly depend on the realistic factors such as social status，economic level and social similarity.What's more，online discourse level embodies the key logic of differentiation and differentiation.