Multifunctional movable double-rotation bridge type grab bucket ship loader and unloader

The invention relates to a multifunctional movable double-rotation bridge type grab bucket ship loading and unloading machine, and relates to the technical field of ship loading and unloading machines. The ship loader comprises a portal frame, a walking mechanism is arranged at the bottom of the portal frame, a ship loader mechanism is arranged on the portal frame, a ship loader rotating mechanism is arranged between the ship loader mechanism and the portal frame, and the ship loader mechanism is rotationally connected with the portal frame through the ship loader rotating mechanism. A ship loader mechanism is arranged above the portal frame, a tail car used for supplying materials to the ship loader mechanism is arranged on one side of the portal frame, a ship unloader mechanism is arranged above the ship loader mechanism, a ship unloader swing mechanism is arranged between the ship loader mechanism and the ship unloader mechanism, and the ship unloader mechanism is rotationally connected with the ship loade