In recent years, it is crucial to describe and enhance the natural fiber’s strength qualities as well as look for new opportunities to use them in composite materials. The technical characteristics of a novel series of Al₂O₃ and Boiled eggshell fillers added polymer composite using Banana fiber as a strengthening material in an Epoxy polymer matrix have been studied in this current experiment. Composites were created and evaluated for varying fiber lengths (100, 150, and 200 mm) and weight percentages of fillers (5, 10, and 15%). 9 samples were prepared and the tensile (TES), flexural (FLS), and impact strength (IMS) of the composites were measured. The numerical formulas were developed for the tensile strength, flexural strength, and impact strength with the investigated process factors using the Design Expert 13 statistical software output coefficients. Optimization was carried out using response surface methodology and the ultimate ideal parameters for maximum tensile strength, impact strength, and flexural strength were discovered as a fiber length of 200 mm and filler content of 11.74%. Final optimum values were found the tensile strength of 14.25 MPa, the impact strength of 37.71 kJm^-2, and the flexural strength of 36.069 MPa. It is observed that the impact of Al₂O₃ and boiled eggshell filling materials in the improvement of mechanical properties are very enormous

Keywords: Banana fiber, Al₂O₃, Boiled eggshell, Mechanical characteristics, Response surface methodology