Manufacturing method of large box girder steel bar component

The invention provides a manufacturing method of a large box girder steel bar component. The manufacturing method comprises the following steps that steel bar unit pieces are manufactured according to the design size; the steel bar unit pieces are assembled into a steel bar mesh according to the design size; the reinforcing mesh, the longitudinal bars and the drag hook bars are assembled and spliced into a reinforcing block body according to the design size; and assembling the reinforcing steel bar blocks into a box girder reinforcing steel bar component according to the design size. According to the method, the manufacturing process of the box girder steel bar component is scientifically optimized, and the construction efficiency can be greatly improved. And by adopting the method, the number of constructors can be greatly reduced, and the labor intensity of the constructors is reduced. According to the method, the machining processes of the reinforcing steel bar unit pieces, the reinforcing steel bar meshes