Compared with the traditional media, network new media has the characteristics of wider range, more ways of dissemination and stronger timeliness, and its influence cannot be underestimated. How to build the good police public relations under the background of network new media rising constantly has become an important problem that the public security organs cannot avoid. In this paper, taking the new network media as the research object, based on the experience of the police in Hong Kong and other places, the characteristics of the network new media and the important functions are analyzed, the strategies of the construction of police public relations are proposed, in order to provide reference for the public security organs and the relevant departments.