Graphitized carbon nitride (g-C₃N₄), as a simple and green photocatalytic material, has been widely used in photocatalytic degradation. However, the photocatalytic activity of g-C₃N₄ was inhibited by poor visible light absorption and high photocarrier recombination rate. Metal quantum dots (Qds)/g-C₃N₄ nanosheets coupled catalysts have attracted more and more attention in the Fenton advanced oxidation process due to their high charge mobility and more active sites. In this work, heterogeneous photocatalysts of Fe-Cu bimetallic oxide quantum coupled with g-C₃N₄ nanosheets were prepared. It shows high activity in Fenton and photocatalytic system. Under the optimal conditions, the removal efficiency of 50 ppm phenol reached 99% after 60 min. The removal efficiency of the catalyst for phenol did not decrease significantly after four cycles of experiments, and the catalyst had good stability. The experimental results show that the synergy between g-C₃N₄ semiconductor photocatalytic oxidation technology and heterogeneous Fenton advanced oxidation technology has great practical significance.