Device applied to external construction of box chamber of box beam and construction method thereof

The invention provides a device applied to external construction of a box chamber of a box beam. The device comprises a traveling system, a bottom plate system and a hanging system, wherein a working frame system is arranged on the bottom plate system; the traveling system comprises two traveling beams arranged at the top of the box beam side by side and two top cross beams; the two top cross beams cross over the two traveling beams and are parallel to each other; an inverted chain steel wire rope is arranged on each top cross beam; sleeper beams are arranged between the traveling beams and a box beam top plate; the bottom plate system comprises a bottom cross beam arranged at the bottom of the box beam and longitudinal distribution beams crossing over the bottom cross beam; the hanging system comprises connection parts used for connecting the top cross beams with the bottom cross beam and a connection system arranged between the two top cross beams; the working frame system comprises steel plates paved on the longitudinal distribution beams and scaffolds corresponding to two sides of the box beam. Through organic combination of the traveling system, a lifting frame system, the hanging system, the bottom plate system and the working frame system, the construction is implemented; the working environment of operators is improved; the personal safety of constructors is ensured.