Fe-based alloy composite coating is produced by laser cladding Fe-base powder containing Cr3C2 powder. The morphology and component of the oxide scales of laser cladding coating at 600 ℃ for 100 h are analyzed by means of scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The results show that the microstructures of the Fe-based alloy composite coatings are uniform and dense without cracks and pores. At 600 ℃ the high-temperature oxidation resistance of the Fe-based composite coatings with Cr3C2 powder is improved obviously compared with the matrix and the accumulative oxidation mass-gain and oxidation ratio are less than the matrix. At 600 ℃ FeCr2O4 spinel oxide are formed on the surface of the pure Fe-base alloy coating with better high-temperature oxidation resistance. With the addition of Cr3C2 powder, Cr3C2 is decomposed at high temperature and the content of Cr in the molten pool is improved significantly, resulting in the formation of the continuous and complete Cr2O3 scales, and the improvement of the high-temperature oxidation resistance compared with the coating without Cr3C2 powder.