In the Internet of Vehicles, the network load capacity may exceed expectations due to the increase in the number of vehicles and the large increase in communication demand, which leads to competition for communication resources and network congestion. Different vehicles have different demands for communication resources, and vehicles with high driving risks should be given more resources, while vehicles with low driving risks should be given a small amount of communication resources. In this paper, the transmission frequency of travel risk and safety messages are considered in the utility function, and a congestion control strategy based on the game-of-risk is proposed, aiming at setting the optimal transmission frequency for vehicles with different communication demands to alleviate channel congestion and save communication resources.