One-pot multicomponent condensation reactions represent an efficient tool to perform efficient synthesis, because they allow the assembly of complex molecules with maximum simplicity and brevity. Dihydropyrimidinones (DHPMs) are important substructures present in a wide variety of biologically active natural products[1]. The magnetic nanocomposite (MNCs) have attracted much consideration due to their rapid and easy separation, economic viability, reusability and recoverability[2,3]. In this study, MgFe2O4@γ–Al2O3 magnetic nanocomposite was characterized by FTIR, FESEM, EDX, VSM, TEM, and XRD. Synthesised catalyst was used for the synthesis of 3,4-dihydropyrimidin-2-ones derivatives via solvent free multicomponent reactions (scheme 1)and structure of products has been determined by IR, 1HNMR, and 13CNMR techniques.