The ultra wideband AOA array antenna single base station positioning system can achieve high-precision 3D positioning with only one base station, with an accuracy better than 20cm. Compared to the 4-5 base stations required for traditional UWB 2D and 3D positioning, it saves more than 60% of the cost; During installation, there is no need to consider the topology structure, and the layout method is more flexible, which can reduce 60% of construction consumables and construction volume, and shorten the construction period.