This report analyzes the communication status of China’s automobile brands in 2018 and 2019，summarizes the communication trend of public opinions on Chinese automobile brands in 2018 and 2019，and sorts out the changes of communication volume and tonality distribution of Chinese automobile brands during this period，so as to reveal the change trend and development characteristics of public opinion of Chinese automobile brands. The public opinion volume of the whole brand and the proportion of positive and negative aspects of public opinion communication are shown in the list. Among them，the volume of public opinion reflects the intensity of brand communication，and from one side reflects the degree of brand attention. The positive and negative proportion of public opinion communication is related to the brand reputation. The higher the positive proportion，the better the brand reputation. If the negative proportion is high，it means that the voice of dissatisfaction with all aspects of the brand is more prominent during the monitoring period.