Abstract: Online role-play games have been an important part of new media culture, which have significant impacts on society. To understand its propagation mechanism or cultural formation mechanism is an important approach to know about how the current culture forms. Through the analysis of propagation factors, this paper constructs a propagation relation model of online games. The relations include: mass propagation and organizational propagation between propagators and gamers, organizational propagation and interpersonal propagation among gamers, and intrapersonal propagation between gamers and their virtual selves. The propagation relation of online game not only has commonness with other propagation relations, but also has its own characteristics based on online games.