Concrete construction method for big-gradient sloping roof

The invention discloses a concrete construction method for a big-gradient sloping roof. At first, a bottom layer formwork module 2 of the big-gradient sloping roof is installed according to needs, roof panel steel bars are bound according to construction drawings and standard requirements, then sprayed concrete construction is carried out on the big-gradient sloping roof panel 1, the big-gradient sloping roof panel 1 comprises the sloping roof formwork module 2 and pre-buried L-shaped pulling ribs 3, the formwork module 2 is machined in advance to be formed and to be hoisted to a full space bearing frame 4, concrete is continuously sprayed and constructed at one time, construction quality of the concrete can be visually observed, and it is guaranteed that the interior of the concrete is dense; after roof concrete is renovated by means of cement mortar with the same proportion of the roof concrete through cleaning of dross on the surface layer, the concrete is square in appearance size, the exterior of the con