MCM-41 immobilized phenanthrolinium dibromide (phen-MCM-Br-2) was easily prepared and applied as an efficient heterogeneous catalyst for aza-Michael addition of aromatic amines to alpha,beta-unsaturated nitriles and nitro compounds in water. The catalyst was characterized by CHN, TGA, FT-IR, SEM, EDAX, XRD, BET, and TEM. It could be simply recovered and reused several times without significant loss of catalytic activity.