The synergetic impact of graphene as a matrix strengthener in hybrid (flax/E-glass/epoxy) fiber-reinforced polymer (HFRP) composites at varied compositions was investigated. The bodily, mechanical, and thermal properties of the HFRP composites have been completely evaluated for varied wt.% of graphene added to the epoxy resin. The HFRP composites have been ready by including graphene to epoxy resin was impregnated on the flax/E-glass cloth utilizing the compression molding approach. Vital enchancment of tensile power, flexural power, shear power, shore D hardness, affect power and interlaminar shear power (ILSS) of the composites elevated by 86%, 85%, 43%, 26%, 50%, and 80% respectively at 0.6 wt.% of graphene. Appreciable discount within the share of water absorption was additionally noticed. Thermogravimetric evaluation (TGA) was used to guage the thermal degradation of the composites, and the impact of floor therapy on flax fiber was validated utilizing Fourier-transform infrared spectroscopy (FTIR). Fractography revealed that the primary failure mechanism was because of matrix fracture and interfacial debonding. The outcomes confirmed that 0.6 wt.% of graphene with HFRP composite laminates considerably improved the power of composites and make them extremely appropriate for cars and structural purposes.