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In this research, the significant application of Fe3O4@SiO2 core-shell nanoparticles as an efficient, green, robust, cost-effective and recoverable nanocatalyst for multi-component reaction of aldehydes, 2-naphthol and dimedone has been developed in aqueous ethanol media under reflux conditions. This procedure also avoids hazardous reagents/solvents, and thus can be an eco-friendly alternative to the existing methods. 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 products have been done on the basis of chemical, analytical and spectral analysis and also the heterogeneous nanoparticles were fully characterized by FT-IR, XRD, EDX, VSM and SEM analysis.