Aiming at the problems of vehicular ad hoc network (VANET) topology, such as slow speed, too much data processing, channel blocking and poor real-time performance, a small ad hoc network link optimization algorithm based on geographic information and ultra-wideband (UWB) is proposed. The system design and theoretical analysis are carried out by using UWB ranging information and geographic information, and the simulation platform based on Matlab is built. The simulation results show that the link model based on the optimization algorithm is in the sub-optimal or optimal level among all possible link models, and the maximum delay optimization can reach 25% compared with other possible models under the same physical topology.