Ship docking supporting system and docking method

The invention provides a ship docking supporting system and a docking method.The ship docking supporting system is arranged at the bottom of a ship body and comprises a first docking block and a second docking block, the first docking block is arranged on the peripheral side of an appendage so as to form a space for containing the appendage when supporting the bottom of the ship body and provide bottom supporting for gravity of the ship body in the appendage area, and the second docking block is arranged on the peripheral side of the appendage; and the second docking block is mainly arranged at the flat ship bottom area of the ship bottom away from the appendage and is used for providing bottom support for the gravity of the ship body in the area outside the appendage. Under the joint matched support of the first docking block and the second docking block, the secondary docking support requirement of the ship with the appendage at the bottom can be met, and an operation space is provided for maintenance and i