To enhance the surface properties of 45 steel, a self-designed Fe-Cr-Ni alloy powder was utilized to fabricate a well formed Fe-based alloy coating via laser cladding. The microstructure and phase composition of this coating were thoroughly examined, and its wear resistance and high temperature oxidation resistance were evaluated. The results show that the microstructure of laser cladding Fe based alloy coating is uniform and compact, there are no obvious defects such as cracks and pores, and the main phase is α-Fe、γ-(Ni-Cr-Fe)、γ-(Fe, Ni)、α-(Fe-Cr) and Fe_0.64Ni_0.36 intermetallic compounds; The hardness of the cladding layer reaches 720 HV, about 3.3 times of the matrix; Through the dry sliding friction and wear test, the friction coefficient of the cladding layer is 0.57, which is lower than that of the matrix. The wear volume of the cladding layer is 0.01 mm³, which is 18.8% of the average wear volume of the matrix; After 100 h high-temperature oxidation, there was no peeling of oxide film on the cladding layer. At 500 ℃, 700 ℃ and 900 ℃, the oxidation weight gain was 2.19 mg·cm^-2, 5.11 mg·cm^-2 and 6.61 mg·cm^-2 respectively.