In the field of additive manufacturing (AM), fused filament fabrication (FFF) of thermoplastic composites reinforced with continuous natural fibers (CNFs) has emerged as a promising sustainable alternative to synthetic fiber composites. This review provides a systematic analysis of the FFF process for continuous natural fiber-reinforced thermoplastic composites (CNFRTCs), focusing on materials, printing techniques, mechanical properties, and applications. A bibliometric analysis of publications (SR) method following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) approach was conducted in this research. The most used fibers are flax and ramie, while polylactic acid (PLA) is the predominant matrix.
