MgFe2O4-decorated UiO-66(Zr)-NH2 composites (MFO@UN) with different blending ratios were efficiently prepared by microwave-assisted synthesis. The results indicate that the hybrid composite exhibits high surface area and magnetic properties. Moreover, combining ferrite into the UiO-66(Zr)-NH2 framework produces a heterojunction structure and an interfacial interaction that improves the composite's visible-light absorption. Tetracycline removal experiments show that the MFO@UN composites exhibit excellent photodegradation performance compared with the pure ferrite and MOF. The optimal 1.5MFO@UN catalyst (molar Zr4+/MgFe2O4=1.5) exhibits the highest removal efficiency of approximately ca. ~92% after 90 min of pre-adsorption and 160min of visible-light illumination. The photocatalytic mechanism investigation reveals that photo-induced holes (h+) and ·OH radicals predominantly govern the photodegradation process. Notably, the separation and immigration of the photo-induced holes and electrons improve due to the heterojunction structures that form between the two semiconductors. In addition, the prepared catalysts are highly recoverable and renewable. These findings suggest that the microwave-derived MgFe2O4@UiO-66(Zr)- NH2 catalyst may be a promising candidate for treating organic contaminants in wastewater.