Roof sheathing suspending formwork and construction method of roof sheathing

The invention discloses a roof sheathing suspending formwork and a construction method of a roof sheathing, and relates to the technical field of building construction. The technical purpose is to solve the problem that during casting construction of a roof sheathing with an empty-picking layer, a large quantity of materials are consumed when a high-formwork support supporting system is adopted, the time and labor are wasted, and high-altitude formwork construction is very dangerous. The roof sheathing suspending formwork comprises several suspension girders and a formwork assemblies, whereinthe suspension girders are erected on already-installed main body structure steel girders, the formwork assemblies are installed among the main body structure steel girders, and the upper surfaces ofthe formwork assemblies are flush with the tops of the main body structure steel girders; the two ends of a suspender are locked and fixed after penetrating through the suspension girders and the formwork assemblies respective