The invention belongs to the field of atmospheric pressure transmission, and relates to the field of single-blade oscillating cylinders, in particular to a high-temperature-resistance single-blade oscillating cylinder. According to the aim, the high-temperature-resistance single-blade oscillating cylinder is provided for meeting high-temperature duration test requirements of certain products. According to the technical scheme, the high-temperature-resistance single-blade oscillating cylinder is provided and comprises an upper sealing cover, a shell, an upper sealing gasket, a blade sealing strip, a stopping rod, a blade position indication rod, a blade rotating shaft, a flat key, an upper sealing cover sealing ring, a stopping pile, a positioning pin, a shell sealing strip, a lower sealing cover, a lower sealing gasket and a lower sealing cover sealing ring.