The utility model provides a gas collecting hood of a
sewage pool. The gas collecting hood comprises a sliding mechanism, a moving plate, a spring, a gas collecting plate, a limiting column, an elastic piece, a
handle, a gas collecting
pipe, a hose, a gas pump and a gas
storage tank, the movable plate, the gas collecting plate and the elastic piece are arranged, the movable plate is connected with the
sewage pool through the sliding mechanism, in addition, the gas collecting plate is embedded in the top of the
sewage pool, when the sewage pool needs to be maintained, the gas collecting plate only needs to be lifted upwards, the bottom of the elastic piece is tightly attached to the top of the movable plate, then the movable plate is pushed away, and opening of the water collecting cover can be achieved; then the sewage pool can be cleaned or maintained; in the process, the operation of manually dismounting screws is eliminated, and the dismounting sequence of the gas-collecting hood is simplified while the use of tools is reduced; and the maintenance difficulty and the labor cost are reduced.