The invention discloses an ultralow temperature freeze drying device for leaves of camellia chrysantha. The ultralow temperature freeze drying device comprises a machine box, a liquid nitrogen conveying pipe, liquid nitrogen spraying and conveying devices, a control box, a driving rotating wheel, a conveying track, a display screen, a rotating wheel control wire, a machine box wire, a first bracket, a driven rotating wheel, a second bracket, a bearing sliding rail, a storage box, support rods, movable balls, and liquid nitrogen conveying holes. According to the ultralow temperature freeze drying device for leaves of camellia chrysantha, provided by the invention, the conveying track is mounted in the device, so that the leaves of camellia chrysantha are conveyed to the inner part of a freezer box through the track, and are quickly frozen and dried by the freezer box; the liquid nitrogen spraying and conveying devices are mounted in the machine box, so that the liquid nitrogen spraying and conveying devices are used for spraying and conveying liquid nitrogen and freezing air currents, the tea leaves are quickly frozen and dried; and therefore, the rate of the tea leaves being dispatched from the factory is increased. The movable balls are separately mounted on the liquid nitrogen spraying and conveying devices, so that the liquid nitrogen spraying and conveying devices can swing to spray frozen air currents, and the internal temperature of the machine box can be kept uniform.