The important difference of Microblog network and WeChat network is network centralization. Microblog is a platform which pay attention to very important users, but WeChat is a decentralized network. Based on this point, we firstly build a model called IRC2S information spreading model to simulate information spreading process in WeChat, and it includes five groups: ignorants, reviewers, collectors, sharers and stiflers. Secondly, a group called super spreaders is added to the IRC2S information spreading model, which embody the feature of centralization of Microblog network. In order to approach real information spreading rules of Microblog network, we distinguish the average degrees of ordinary nodes and center nodes which reflect the feature that very important users have a great many of fans. Finally, we perform numerical simulation to the above three models and discover that centralization of network make information's propagation speed faster and information's propagation range wider.
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