Multiwalled carbon nanotubes/cuprous oxide (MWCNTs/Cu2O) composite microsphere was fabricated by liquid phase reducing method. The analysis of functional group, phase and morphology on the samples were characterized by IR, SEM and XRD. The results showed that MWCNTs were combined with Cu2O to form composite microsphere by vertical and horizontal interspersing. Compared with pure Cu2O, MWCNTs/Cu2O composite catalyst has more excellent catalytic effect for target organic N-formylmorpholine(NFM) wastewater.