Despite of many advantages, natural fibers exhibit high hydrophilicity and inherent incompatibility with hydrophobic matrices often lead to interfacial adhesion issues, compromising the mechanical and thermal characterstics of hybrid fiber composites. One promising avenue for enhancing the characterstics of these hybrid composites involves the premeditated usage of coupling agents. Coupling agents typically contain functional groups that can interact with both fibers and matrix. The fibers possess hydroxyl (-OH) groups, while the matrix often contains non-polar groups such as hydrocarbons. Coupling agents with one end that can hydrogen bond with the hydroxyl groups on the fibers and the other end that can cooperate with the non-polar groups in the matrix effectively bridge the gap between the two materials, leading to improved interfacial adhesion. Iimplementations of coupling agent has shown significant potential in enhancing the mechanical, thermal, and structural characterstics of composite materials. By promoting a stronger bonding between the fibers and matrix, coupling agents have the capacity to bolster the overall performance of kenaf/EFB fiber hybrid composites. Maleic anhydride (MAH) and Silane coupling agents exhibit promising potential as suitable candidates for enhancing the overall characteristics of composites.