 This study extracts cellulose microfibers from raw Grua Optiva, GEO, fiber using a chemo-mechanical method and investigates the thermal and mechanical properties of the extracted fibers and their reinforced epoxy composites, finding that the composite with 48% of fiber has shown higher tensile, impact strength and hardness properties. This article was authored by Abelosh Karakoti, J. Ronald Asir, Priya K. Dason, and others.