 The article investigates the physicochemical, thermal, and surface morphological properties of cedar-miserensis-fibre SMF for the first time, revealing its high cellulose content, low hemicelluloses and lignin, and small crystalline size. The study also determines SMF's crystallinity index, thermal stability, and kinetic activation energy, confirming its potential as a reinforcement in polymer composite. This article was authored by M. Moran, R. Kumar, P. Senthama Rai Kannan, and others.