The ATXL-B spiral ship unloader can walk longitudinally on the dock track and has strong maneuverability. By relying on the bidirectional horizontal rotation of the rotary tower, the elevation and amplitude variation of the horizontal beam on the tower, the forward and backward swing of the vertical arm, and the walking of the gantry crane, the feeder can achieve three-dimensional motion tracking of the material position for material retrieval. Then, the material is lifted to the horizontal spiral machine by the vertical spiral machine and automatically unloaded from the ship's warehouse to the shore through the discharge device in the conveying system.