With the development of information technology and Internet technology, the functions inside the car are constantly integrated, and the operation mode is increasingly complex. The traditional functions of the car cannot meet the growing needs of human beings. The new era of intelligent cars requires the participation of human-computer interaction, so that the car is more intelligent and more modern. Human-computer interaction refers to the process of information exchange between human and computer by using a certain dialogue language and in a certain interaction way to complete certain tasks. An important problem of human-computer interaction is that different computer users have different usage styles – they have different educational backgrounds, different ways of understanding, different learning methods and different skills, as well as cultural and ethnic factors. Secondly, the research and design of human-computer interaction needs to consider that the user interface technology changes rapidly, and the new interaction technology provided may not be applicable to the previous research. This paper discusses the research of human-computer interaction in the field of intelligent vehicles from the perspectives of voice interaction, vehicle voice image personality, visual gesture recognition and on-board music control.