A solvothermal method using TiO2 nanobelts as a substrate, ethylenediamine as a reducing agent and a nitrogen source to synthesize the photocatalytic composite Bi0/Bi2O2CO3/N-TiO2 is proposed. The obtained material was characterized by XRD, SEM, TEM etc. In the architecture of the composite, compound quantum dots combined with Bi0 and Bi2O2CO3 (1.40~1.50 nm) uniformly grew on the surface of TiO2 nanobelts (NBs). Compared with TiO2 (30.95％), Bi0/Bi2O2CO3/N-TiO2 realized a more efficient degradation of Rhodamine B (95.02%) under visible light irradiation. Finally, the active species-trapping experiments was carried out to explore the main active species. In the photoreaction, h+ and •OH may be the main active species.