Abstract: 8 mm thick high-strength wear-resistant steel plates were welded by mixed gas arc welding with H08Mn2Si and ER80Q welding wires respectively. The welding test of the test plates with oblique Y-shaped groove was carried out to detect the cracking sensitivity of the welded joint. The butt welding of the plates was carried out, and the macroscopic morphology, microstructure, mechanical properties and hardness distribution of the welded joints were tested. The result shows that the wear-resistant steel has good weldability, the joints welded by H08Mn2Si and ER80Q welding wires are all free from defects. The microstructure of the weld zone is predominantly martensite, bainite and ferrite; and the precipitated phases are predominantly titanium carbide and titanium nitride, and the both phases differ obviously in morphology, and are mainly present in the heat-affected zone.