With the rapid development of the Internet, the network catchwords keep popping up. As one of the most important language forms in the current Internet era, the network catchwords have a lot of language variations. Based on the prototype category theory, this paper analyzes the variation of voice in network catchwords from two aspects : homophonization and monosyllabic. And it explores the semantic variation by probing into the extension of horizontal meaning on basic category of network catchwords and the extension of vertical meaning of subeategory, whic...