The invention provides transmission cases on two sides of a personnel airlock. The transmission cases solve the technical problems that transmission cases on two sides of an existing personnel airlock are complex in structure, large in adjustment difficulty coefficient and poor in practicability and time and labors are wasted in operation. Each transmission case is provided with an upper cover plate, a lower bottom plate, side cover plates, a worm, a worm-wheel shaft, a rotating shaft and an interlocking device; the worm-wheel shaft is provided with a bearing and longitudinally penetrates through a box body and is fixedly connected with the box body through the bearing; the worm and the rotating shaft transversely penetrate through the box body and are fixedly connected with the box body, and the worm is meshed with a worm wheel. The transmission cases on the two sides of the personnel airlock can be widely applied to the transmission field.