To refine the coarse primary carbides in the high carbon and high chromium alloy hardfacing layer and improve the wear resistance of the surfacing layer. D632A welding rods were selected for hardfacing on Q235 steel plates, and the laser-arc hybrid hardfacing sample and the arc hardfacing sample were compared. Microhardness test and friction and wear test were taken to value the hardness and wear resistance. Their microstructure of the hardfacing layer before wear was observed by Optical microscopy (OM) and their morphologies were studied by SEM. The reasons for the difference in friction and wear properties between laser-arc hybrid hardfacing samples and arc hardfacing samples. Under the action of laser-arc hybrid heat source, the M7C3 primary carbides in the hardfacing layer are refined into fine granular from coarse strip. Theses granular carbides were evenly distributed. Compared with arc hardfacing layer, the average microhardness of the laser-arc hybrid hardfacing layer was increased by about 12.5%, and the maximum microhardness was 1064 HV. The wear resistance of the laser-arc hybrid hardfacing layer was better. The wear quality was 5 mg and the friction coefficient was 0.38 under the same conditions. The wear resistance of the arc hardfacing layer was poor. The wear quality was 7 mg and the friction coefficient was 0.43 under the same conditions. The mainly wear failure mechanism of the two hardfacing layer was fatigue failure. Laser-arc hybrid hardfacing can effectively improve the hardness and wear resistance of the high carbon and high chromium alloy hardfacing layer by refining the primary carbide in the hardfacing layer.