Abstract: After the Jakarta Bandung high-speed railway entered normal operation, its data asset scale gradually expanded, and there are problems such as insufficient data security protection system. This paper combined the requirements of data security laws and regulations in China and Indonesia to analyze the data security protection needs of the Jakarta-Bandung high-speed railway project, designed a data security protection system for the Jakarta-Bandung high-speed railway project, studied data lifecycle protection and management technology, and efficient encryption and decryption technology for mobile data. It provides technical support and reference for the Jakarta-Bandung high-speed railway to implement data flow status visualization, classification and grading protection, comprehensive monitoring and auditing, and other protection capabilities.