A laser clad Co-based WC coating is disclosed. Co-based WC composite powder is subjected to laser cladding on a surface by adopting a semiconductor laser. The microhardness and high-temperature wear resistance of the coating after laser cladding are improved to a large extent. The major constitution phases of the coating are a supersaturated solid solution Co, and hard phases including CoCx, Fe<3>W3C, (Cr,Fe)<23>C6, and the like. In a wear process of the coating at a high temperature of 600 DEG C, on the one hand, a Co-rich area which is relatively low in hardness is worn firstly so that carbide hard phases having high hardness are shown on the surface and wearing action of a material is prevented; and on the other hand, Co and Cr elements promote formation of CoO and CoO.Cr2O3 oxide filmshaving lubricating functions in a high-temperature friction process so that the friction coefficient is reduced, and therefore high-temperature wear resistance of the clad layer is increased by about2 times. High-temperature wear mechanisms of the clad layer mainly include abrasive particle wear and adhesive wear.