The Internet of Vehicles(IoV) is a research hotspot of the fifth generation(5G) mobile communication network. Cellular Vehicle To Everything(C-V2X) is an Internet of Vehicles solution based on cellular network technology and is an important part of ultra-Reliable and Low Latency Communication(uRLLC) in 5G network. The realization of the Internet of Vehicles technology is of great significance to modern transportation. This paper offers a systematic survey of existing research achievements of the domestic and foreign researchers in recent years. Firstly, a brief description of the definition of the Internet of Vehicles is given, and the standard research progress of C-V2X is summarized. Next, the centralized and distributed resource scheduling methods under LTE-V2X and NR-V2X are described respectively, and the existing research methods are classified. Finally, a perspective of the future work in this research area is discussed.