Abstract: Nano-Cu2O powders were prepared by special liquid-phase precipitation with high strength mechanical mixing and characterized with XRD and TEM. The photocatalytic behavior of such prepared nano-Cu2O was evaluated by the decomposition of acidic fuchsine solution under daylight. The influence of glucose addition and the initial concentration of acidic fuchsine solution as well as the catalyst reusability were examined. A 99.1% photocatalyzed degradation was achieved with 6mg/L initial concentration of acidic fuchsine solution in 2.5h added with 7g/L of glucose. This photocatalytic degradation remained with 75% after the catalyst repetitively used for 6 times.