Continuous fiber reinforced composite via additive manufacturing (AM) is an emerging in-situ forming technology that, combined with the digital fabrication approach, offers the advantages of efficient design and rapid manufacturing. In order to give full play to its design freedom and further realize the lightweight performance of composite, a stress-driven continuous fiber path infill method was proposed based on the wave projection function. The fiber infill morphology was optimized according to the stress field distribution of load-bearing structure, and different filling densities were set to adjust the structural load-bearing performance. At the same time, the simulated annealing algorithm was employed to generate continuous fiber paths with minimal interruptions and shortest total length. The application cases of 2D satellite silo plate and 3D UAV wing segment further verify the applicability of this method. This generative design for composite structure is a typical AM-driven approach, which is expected to provide a theoretical and technical basis for the
integration of functional design and manufacturing of composite structures in the future.