With the continuous improvement of China’s scientific and technological level, the popularity of mobile network technology is becoming more and more widespread. Many big data technologies and wireless sensor technologies have brought new changes to people’s lives. At present, the functions of communication technology and network transmission have moved from perfection to new innovation and development. 5G mobile network technology has played an important role in various fields. When China’s economy and science and technology develop better and better, people pay more and more attention to children’s education. The research on children’s education has become a hot topic. From the above background, this paper studies the network transmission function and network transmission path of children’s education app in 5G era mobile computing technology. First, starting from the development trend and main functions of 5G, this paper briefly describes the functional requirements of children’s education app. The efficient data transmission in the 5G mobile wireless sensor network is applied to children’s education app. Starting from the distance of network transmission nodes, the data transmission optimization algorithm is adopted, and the network transmission module is composed of the best transmission path of nodes. Combined with the energy-saving effect of mobile computing technology, the problem of excessive consumption of network transmission resources is optimized. Finally, the data transmission path is studied in the 5G mobile network. The results show that 5G mobile computing technology can optimize the network transmission performance, improve the operation efficiency of the server, and has a good effect in solving the problems of delay and low coverage. In the process of children’s education app network transmission under 5G mobile computing technology, it can ensure the user’s personal information and improve the security of system feedback.