Abstract: The development of blockchain technology provides new solutions for the security of internet of vehicles. The paper introduced the characteristics of blockchain and the corresponding solvable security problems of the internet of vehicles. We discussed the application of blockchain in the three aspects of the internet of vehicles: vehicle identity authentication, vehicle data privacy protection, and system security construction in combination with related literature classifications. Meanwhile, the security analysis and performance evaluation of the fusion system was briefly described. The future research direction of the field was prospected.