 This study reports the first-time analysis of the chemical, physical, mechanical, thermal, microscopic, and spectroscopic properties of raw and alkali-treated coconut tree primary flower leaf stalk fiber, CPFLSF. The influence of different percentages of NaOH on the properties of the fibers is explored. FTIR analysis reveals that the cellulose and wax content reduces with increasing NaOH concentration, while tensile testing shows that CPFLSF treated with 6% NaOH exhibits better tensile properties in the range of 2008 to 2653 MPa. XRD analysis shows that CPFLSF treated with 6% NaOH has a crystallinity index of 40.12% and a crystallinity size of 27.25 nanometers. Thermographometric analysis reveals that CPFLSF, 6% is thermally stable up to 250°C. Scanning electron microscopy analysis shows the presence of impurities on the raw fiber surface, which are minimized with high concentration NaOH treatment, leading to enhanced properties. The study provides a way to manufacture a polymer matrix composite for light load automotive applications. This article was authored by Ramathia Muggen, M. J. Aroch, D. Shen Muggen, and others. We are article.tv, links in the description below.