In this work, magnetic In 2 S 3 /ZnFe 2 O 4 nanocomposites were fabricated via a two-step solvothermal process, which In 2 S 3 loading amount on ZnFe 2 O 4 support medium could be controlled by changing reaction mass. Investigation revealed that the photocatalytic activity of In 2 S 3 /ZnFe 2 O 4 nanocomposites was uperior to pure In 2 S 3 and ZnFe 2 O 4 for the degradation of MB driven by visible light. The improved photocatalytic activity may be stemming from the synergy effect of In 2 S 3 and ZnFe 2 O 4 , resulting in the enhanced visible light absorbance and higher separation efficiency of the photo-generated charge carriers. Significantly, this sort of nanocomposites could rapidly be separated through an external magnetic field, and five successive cycle experiments have proved that it was stable and recyclable. Finally, a possible mechanism related to the separation of charge and photocatalytic decomposition of MB was also provided.