Abstract: The characteristics and problems of the large-scale integrated molding marine composite components are analyzed, and the latest application status at home and abroad is explained. Based on the study above, the AGV composite robot intelligent grinding system is designed to solve the problems. The key technologies like the automatically generated grinding trajectoryof robot are introduced. Finally, the system is tested physically. The grinding efficiency is improved by more than 10 times compared with that of the manual grinding, the grinding mechanical roughness reaches 0.63 μm, and the linear precision reaches 0.5 mm, which can fully meet the practical use requirements of the marine composite components. The development of a high-performance AGV composite robot intelligent grinding system can not only improve the grinding quality and efficiency of the large-scale integrated molding marine composite components, but also provide an effective research platform for realizing other processing processes for the large-scale marine composite components, thus laying the foundation for the subsequent digital, clustered and pulsed production of the same type of products.