Vehicle Ad Hoc Network (VANET) is a kind of wireless ad hoc network, which takes the vehicle as the communication node. It aims to achieve data transmission between vehicle and vehicle, or between vehicle and infrastructure. The high-speed mobility of vehicles can easily cause the change of network topology, reducing the transmission rate of data packets and the efficiency of routing protocol and even leading to channel interruption. The research on the communication protocol and application of the VANET is mainly implemented by the simulation platform. The performance of vehicle mobility model embedded in the platform for protocol analysis and research is crucial. In this paper, firstly, various car-following models under the Simulation of Urban Mobility (SUMO) platform are described in details. Then, three factors that have the most obvious impact on the performance of mobile models are introduced. Finally, based on the urban road traffic environment, the three indicators of vehicle density, average vehicle speed and road occupancy rate under different car-following models are compared and analyzed in different simulation scenarios. The results show that Krauss model has best performance. In addition, simulating the car-following behavior of a single vehicle reveals the working mechanism of each model microscopically.