Abstract: The nitrate containing nickel, iron and cobalt were under reaction at 180 ℃ for 24 h with a solvent heat treatment. With the subsequent phosphating reaction, nickel-iron-cobalt phosphide nanosheet arrays (NiFeCoP@NF) were prepared on the nickel foam substrate. XRD, SEM, TEM and XPS were used to characterize the material. The oxygen evolution performance of the Ni-Fe-Co phosphide nanosheet arrays was studied with the electrochemical workstation. The results demonstrated that when the current density reached 10 mA/cm², the overpotential needed was only 160 mV, and can be maintained for 24 h at a constant current density. The research can be used for reference in the study of nanostructured transition metal phosphides electrocatalysts.