Abstract: The Chongqing early warning project includes hundreds of early warning monitoring stations. The observation data will be more and more abundant, the calculation and determination of the epicenter and magnitude will be more accurate, and the early warning effect will be significantly improved. Hundreds of stations transmitting data in the early warning system will greatly consume the data transmission capacity of the core router. In order to improve the efficiency of network equipment routing protocol algorithm and network data transmission performance, scientific and reasonable IP address planning is a very important technical link. In this paper, some basic principles and methods of IP address planning of Chongqing earthquake early warning project are described in detail. It has achieved good results in practice, and can provide some reference for the design and planning of other network projects.