The Internet of Cars (IoV) has gained popularity in recent years as the number of vehicles on the road keeps increasing. With the development of 5G technology, positioning technologywhich is essential to the implementation of IoVhas also started to gain popularity as a research issue. This paper summarises the development and current status of current Telematics positioning technology through the study of the optimization scheme of Telematics positioning technology based on 5G technology. It also clearly shows that the latency of the current Telematics positioning technology has been reduced to a certain extent, and the accuracy has been improved by describing the Telematics, positioning technology and the optimization of the positioning technology from shallow to deep. However, due to practical factors such as site, many technologies have not been further validated and used, and there is still much room for the development of positioning technology. However, with the further development of communication and transmission technologies, the positioning accuracy of Telematics will definitely be improved substantially.