With the rapid development of intelligent connected vehicles, multi-source heterogeneous data is continuously generated during operation. How to efficiently and securely process these data has become a core issue faced by the industry. This article systematically expounds the basic technical system of automotive data processing, its full-process operation mechanism, and further proposes optimization strategies to enhance the overall quality and response efficiency of data processing, providing theoretical basis and practical reference for the construction and practical application of data systems in intelligent connected vehicles.