Construction method of cable-stayed suspension cable cooperative system bridge

The invention relates to a construction method of a cable-stayed suspension cable cooperative system bridge, which relates to the technical field of bridge engineering. A hoisting opening is formed between a cable-stayed area beam section and a suspension cable area beam section of the cable-stayed suspension cable cooperative system bridge. The construction method comprises the following steps that according to preset division conditions, a cross area beam section of the cable-stayed suspension cable cooperative system bridge is divided into a plurality of sections, and a second mounting position for mounting a pair of temporary suspenders is reserved on each section; the preset division conditions are as follows: the number of the sections is equal to the number of pairs of permanent suspenders of the cross area beam section, and each section is provided with a first mounting position for mounting a pair of permanent suspenders; the sections are hoisted to the hoisting openings; a permanent suspender and a