Construction method of bent arch suspension bridge

The invention discloses a construction method of a bent arch suspension bridge, and relates to the technical field of bridge engineering, and the construction method comprises the following steps: building a pair of skewbacks which are symmetrically arranged on the two sides of the width direction of an existing road; a rotating hinge is mounted at the top end of each skewback; two half auxiliary arches are assembled on the assembling support, and the bottom end of each half auxiliary arch is hinged to a rotating hinge: the two half auxiliary arches rotate around the rotating hinge and are folded to form a main auxiliary arch; multiple groups of main and auxiliary arches are repeatedly constructed at equal intervals in the length direction of the existing road to form a main and auxiliary arch framed bent; starting from the first section of the steel beam section by using a deck crane, mounting the rest of the steel beam sections section by section while walking; every time one steel beam section is hoisted,