In order to improve the wear and corrosion resistance of SUS630 stainless steel (SS) used as valve stem, Stellite 6 cobalt-based alloy coating was prepared on its surface by laser cladding technology. The microhardness, wear and corrosion properties of Stellite 6 coating and SUS630 SS were studied. The results show that compared with SUS630 SS, the hardness of Stellite 6 coating increases by 25% and the wear volume decreases by 50%, indicating that Stellite 6 coating has better wear resistance than SUS630 SS. In addition, in 3.5% NaCl solution, the corrosion potential (-0.18 V) and the impedance value of the passive film (367 kΩcm2) of the Stellite 6 coating were higher than that of SUS630 SS (-0.35 V and 129 kΩcm2), while the passivation current density (10-7 -10-6 A/cm2) of Stellite 6 coating was lower than that (10-6 -10-5 A/cm2) of SUS630 SS, indicating that Stellite 6 coating has better corrosion resistanc than SUS630 SS. Therefore, laser cladding Stellite 6 coating can improve the wear and corrosion resistance of SUS630 SS.