Refitting process of ship lashing bridge of large containers

The invention discloses a refitting process of a ship lashing bridge of large containers. The refitting process comprises the steps of manufacturing of a new lashing bridge, dismantling of an old lashing bridge and installing the new lashing bridge. After the new lashing bridge is prefabricated, a horizontal inspection line and a transverse positioning inspection line are marked out; the longitudinal slope a of a whole ship is measured and determined by using a total station; a plumb bob tool is arranged on the new binding bridge; a horizontal mounting line and a transverse positioning mounting line are marked on a hatch coaming; the horizontal and transverse inspection lines and mounting lines are matched, so that horizontal and transverse positioning can be properly completed; the distance d between a plumb bob in the plumb bob tool and the new binding bridge is adjusted according to the length L of the midperpendicular of the plumb bob tool and the longitudinal slope a of the wholeship, d is enabled to be equal to L * sina, so that longitudinal positioning can be properly completed; and finally, the new lashing bridge is fixed. According to the refitting process, the technicalproblem that a ship body is longitudinally inclined and the problem that a new binding bridge is not easy to install on a wharf are solved, the construction difficulty is reduced, the installation precision is guaranteed, and the repair and refitting cost is reduced.