The extensive coverage of 5G mobile communication benefits from the use of dense network technology, through the access of multiple wireless networks, so that its network coverage is large. Dense network technology mainly achieves large coverage of mobile networks in two ways. First, the first is to set up multiple antennas outside the base station to increase the network area, and second, to lay out multiple dense networks outside so that they can work together. Increase efficiency and accuracy. However, dense network technology is still insufficient, mainly due to the existence of some interference in small areas, reducing the efficiency of the network. At the same time, antenna technology based on artificial intelligence technology is conducive to the realization of 5G large-scale coverage, can improve anti-jamming, improve the functionality of network systems. Using artificial intelligence algorithm, data map can be used to track the beam output and input of 5G communication network in real time, carry out effective amount management, and do a good job in base station positioning. Artificial intelligence technology can effectively calculate and analyze the distribution of users, find the law, and flexibly adjust the distribution of beams, expand the coverage area, can achieve vertical coverage of venues, high-rises and other scenes. In the design of broadcast signals in some fixed places, artificial intelligence technology can be used, combined with their algorithms and measurement reports, to identify the scene, calculate the optimal weight, improve the quality of broadcast signals, strengthen their anti-jamming.