Untreated and alkali-treated (5% NaOH) Chloris barbata flower fibers (CBFFs) were used to fabricate the composites by hand lay-up method.Novel composite plates were manufactured by changing fiber weight fraction (5 weight%, 10 weight%, 15 weight%, 20 weight%, and 25 weight%), raw and 5% NaOH treated fibers.The impact of NaOH treatment and fiber weight, fraction on tensile, flexural, impact, morphol. and thermal properties of CBFF reinforced epoxy composites were examined and reported for the first time in this article.The tensile, flexural, and impact properties of the composites were increased up to 20 weight % fiber addition and after that dropped.After the tensile testing, broken cross-sections of the composites were analyzed by SEM, which showed that NaOH treated CBFF reinforced composite has better interfacial bonding and lesser voids.Thermogravimetric anal. (TGA), Fourier transform IR anal. (FTIR), and Atomic force microscope (AFM) anal. of composites also pointed out that alkali-treated CBFF is a suitable material for reinforcement with the epoxy polymer matrix.