Carbon nanotubes embedded in cuprous oxide (Cu2O/MWNTs) particles composites superflue spheres were fabricated in situ in the solution method. The products were characterized through scanning electron microscope (SEM), transmission electron microscope (TEM) and UV-visible photometer. The results have shown that the MWNTs are embedded in cuprous oxide spheres homogeneously. The size of compound spheres is influenced by the reaction temperature, the concentration ration of the reactant and the titration speed of sodium hydroxide. By comparing the photocatalytic effect of cuprous oxide on the p-nitrophenol with that of the compound spheres which consist of carbon nanotubes embedded in cuprous oxide, the results have shown that the degradation rate is about 10% higher than cuprous oxide.