The invention discloses an Internet of Vehicles IEEE 802.11 broadcast performance analysis method and application, and belongs to the technical field of Internet of Vehicles. A two-dimensional Markovstate transfer chain is established by considering a continuous freezing process. The probability of each state of the vehicle node in the two-dimensional Markov state transition chain and the transition state probability is calculated according to the two-dimensional Markov state transition chain, and accurately predicting the average time delay, throughput and successful receiving rate of a sending packet of the vehicle node. The method is suitable for performance analysis of the Internet of Vehicles media control access layer under a broadcasting mechanism. a theoretical analysis basis is provided for accurately predicting the performance of the MAC layer. According to simulation experiment data, under the condition of a large competition window or a small competition window, the valuesof the average time delay, the throughput and the successful receiving rate of the sending packet of the vehicle node predicted by the method are closer to the actual value compared with the value predicted by an existing one-dimensional Markov model.