Bridge overline construction protective door opening capable of being assembled and construction method thereof

The invention discloses a bridge overline construction protective door opening capable of being assembled and a construction method thereof, relates to the technical field of bridge construction, and solves the problem of low construction efficiency of existing protective door openings. The multiple protection supporting frames are arranged on the two side walls of a construction door opening in pairs in parallel, the supporting cross beams are arranged on the tops of the multiple sets of protection supporting frames on the same side, and the protection structures are detachably erected on the tops of the protection supporting frames through the supporting cross beams. The protective supporting frame comprises a first component, a second component, a third component and a fourth component, and the first component, the second component, the third component and the fourth component are sequentially spliced from top to bottom. The method has the advantages of being high in construction speed, easy and convenient