The information technology represented by Internet communication has gradually become the core foundation to pro- mote human development. Human society has also gradually stepped from the information age to the intelligent age, opening the seventh information revolution and welcoming the arrival of 5G era. 5G will combine with big data, cloud computing, arti- ficial intelligence and other information technologies, connect everything, aggregate platforms and drive industries, playing a huge role in scientific and technological progress and social development. Based on the characteristics and development trend of 5G era, this paper summarizes the advantages and challenges of 5G era, makes a brief analysis on the security problems of computer network information, and puts forward corresponding solutions.