In this research, the significant application of Fe 3 O 4 @SiO 2 core-shell nanoparticles as efficient, green, robust, cost-effective and recoverable nanocatalyst for the multi-component reaction of aldehydes, 2-naphthol and dimedone has been developed in aqueous ethanol media under reflux conditions. In the presented procedure we had avoided to use of hazardous reagents and solvents and therefore this method can be considered as a green alternative pathway in comparison with the previous method. Simple procedure, environmentally benign, excellent yields, short reaction times, simple purification and facile catalyst separation are advantages of this protocol. Characterization and structural elucidation of the prepared products have been done on the basis of chemical, analytical and spectral analysis. In addition, the heterogeneous nanoparticles were fully characterized by FT-IR, XRD, EDX, VSM and SEM analysis.