In order to improve the the domestic technology level of HVDC/UHVDC transmission protection and control equipment, an autonomous and controllable domestic protection and control hardware platform is designed and developed. This platform is based on the architecture and application functions of HVDC transmission protection and control hardware platform, adopts domestic components and domestic embedded real-time operating system (RTOS), and combines with high-speed serial backplane bus technology, high speed time division multiplexing communication (FTDM) technology and graphical programming technology, possessing the capabilities of high-performance acquisition and measurement, calculation and processing, control output and high-speed communication connection. The performance indexes of the platform proposed are compared with that of foreign enterprises’ HVDC transmission protection and control hardware platforms and the domestic existing platform. Digital dynamic simulation test verification and engineering application from platform level, device level, and system level are further introduced. The results show that the developed platform works stably and reliably, and can meet the requirements of engineering applications of HVDC/UHVDC transmission.