High-pressure cage-type single-seat regulating valve adopts a valve core structure with unbalanced fluid pressure. The special single-seat valve core combined with the cage-type top guide valve internals enables it to possess the characteristics of a single-seat regulating valve, while also having the dynamic stability of a sleeve-type regulating valve. The cage-type guide sleeve also plays a role in resisting erosion and preventing vaporization. The quick-disassembly valve internal component combination is very convenient for updating the valve internal components. It is suitable for small specifications, high pressure differences, high temperatures and other harsh working conditions, especially for various slurries, polymers and high-temperature media.