Composite materials emerge as a captivating avenue for bolstering sustainability across diverse applications by artfully integrating renewable resources, particularly through the creation of starch-based composites fortified with jute fibers via an injection molding technique. This process yields materials that are kind to the environment. By enhancing the bond at the interface between the jute fibers and the starch matrix, the mechanical characteristics, including strength and rigidity, saw noteworthy improvement. The jute strands underwent sodium hydroxide (NaOH) treatment for partial delignification, which fostered superior compatibility between the fiber and matrix. Additionally, a blocking reaction further amplified hydrogen bonding, culminating in exceptional mechanical performance. The findings underscore the viability of jute-starch composites as biodegradable options, boasting increased strength and rigidity, serving as practical, sustainable substitutes for conventional materials. This study underscores the significance of such composites in fostering eco-friendly solutions, particularly within the realms of green construction and packaging, while aligning with the larger objective of minimizing environmental footprints.