Abstract: Intelligent connected vehicles have led the transformation of the automotive industry, but their complexity and technological innovation have brought enormous challenges to testing and verification, with traditional testing methods no longer able to meet these needs. This article explores the key technologies and applications of mobile carrier platforms for intelligent connected vehicle testing equipment. It analyzes the testing requirements for intelligent connected vehicles, including autonomous driving functions, sensor performance, communication capabilities, and safety aspects. The paper provides an overview of current research status both domestically and internationally, and introduces core technologies such as autonomous driving technology, communication systems, data processing, and energy management systems. Applications of mobile carrier platforms are discussed across various scenarios including closed testing environments, open road testing, simulation testing, and special environment testing. Solutions are proposed for addressing technical challenges, regulatory and standardization issues, commercial implementation, and data privacy and security concerns. Finally, future development trends are examined, emphasizing the importance of technological innovation, standardization, market promotion, and sustainable development. Research demonstrates that mobile carrier platforms play a crucial role in improving testing efficiency, ensuring vehicle safety, and accelerating technological innovation, and will continue to drive the advancement of intelligent connected vehicles in the future.