The invention relates to a closed fan-shaped gate valve with a residual air recovery device and belongs to the technical field of valves. The closed fan-shaped gate valve mainly solves the problem that the existing valve for controlling high-low temperature oil gases and a loosening solid medium channel switch is low in work efficiency and not closed in field environment. The closed fan-shaped gate valve is characterized by comprising a fan-shaped valve, a protection cylinder, an externally added sealing force device and a transmission device, wherein the externally added sealing force device is connected with an end port on one side of the fan-shaped valve, the protection cylinder is connected with the externally added sealing force device, the transmission device is connected with a flashboard of the fan-shaped valve, a drill rod airtight cover is arranged at the upper end of the protection cylinder, and a river diversion port is arranged on the side portion. The closed fan-shaped gate valve has the advantages of being high in work efficiency, applicable to sites with relatively small pressure, good in field environment and long in whole machine service life, simultaneously laying a foundation for closed decoking in the future, being mainly used in the high-low temperature oil gases and the loosening solid medium channel, being capable of automatically controlling hard-face sealing of switching of the channels, and being provided with the residual air recovery device.