In this research, the impact of incorporating short aramid fibers of varying lengths to the adhesive layer on the shear strength of adhesive joints was examined, aiming to improve the overall strength of the adhesive connections. The steel substrates were treated using shot-blasting and grit-blasting methods, respectively. Meanwhile, the resin pre-coating (RPC) technique, which is frequently employed to enhance the surface wettability of substrates, was implemented in this test. Firstly, a parametric approach was followed to determine the optimal RPC solution concentration for wetting the substrates. Subsequently, aramid fibers of different lengths were incorporated into the adhesive layer between the steel surfaces to improve the shear strength of the adhesive joints. Finally, the specimens underwent a single lap shear test using an electronic universal testing machine. The results were analyzed to determine the most effective enhancement approach for boosting the effectiveness of adhesive joints. Initial findings suggest that adding 1 mm short aramid fibers to the bonding layer, along with the application of RPC treatment, can substantially improve the bond strength of adhesive joints. This finding indicated that the integration of aramid fibers along with RPC treatment can significantly enhance the mechanical performance of the adhesive layer, thus expanding the possible applications of bonding reinforcement systems (such as the carbon fiber reinforced polymer (CFRP) bonded reinforcement system).