In this book Lemongrass fiber was analysed to determine the chemical proportion of its lignocellulosic components. Fibre's thermal behaviour, surface structures, and functionality were assessed by thermo gravimetric analysis (TGA), scanning electron microscope (SEM), and Fourier transform-infrared spectroscopy (FTIR), respectively. SEM showed that the modified fiber composites demonstrated better compatibility. Lemongrass fiber reinforcement substantially improved the mechanical properties of the composites.