Quick release type highway box girder hydraulic internal mold and working method thereof

The invention discloses a quick release type highway box girder hydraulic internal mold and a working method thereof.The quick release type highway box girder hydraulic internal mold comprises an internal mold middle section section, the two ends of the internal mold middle section section are sequentially connected with internal mold variable section sections and internal mold end section sections from inside to outside, and the internal mold middle section section, the internal mold variable section sections and the internal mold end section sections each comprise a supporting bottom plate; a supporting beam is installed in the middle of the upper surface of the supporting bottom plate, lower movable dies are arranged on the two sides of the supporting beam respectively, a first upper movable die and a second upper movable die are arranged on the two sides above the supporting beam respectively and abut against each other, and the top edges of the two lower movable dies are hinged to the first upper movable