Forming tool for S-shaped air inlet channel of airplane and design and use method of forming tool

The invention discloses a forming tool for an S-shaped air inlet channel of an airplane and a design and use method of the forming tool. The forming tool comprises a core mold and a paving supporting frame; the core mold is of a detachable multi-section structure, and the sections are hollow; each section of core mold comprises a plurality of detachable core mold sub-bodies, and each core mold sub-body can be taken out from the inner cavity of the S-shaped air inlet passage workpiece; and the paving support frame is used for supporting the assembled core mold to perform paving and molding of the S-shaped air inlet passage part composite material. The core mold is of a hollow structure and is divided into a plurality of blocks, the weight of the mold is reduced, meanwhile, an operation space is provided for internal disassembly of the mold, the core mold is conveniently taken out in a block mode during demolding, and the demolding problem after an S-shaped air inlet channel workpiece is formed is solved; and m