Abstract: The macrostructure,microstructure,mechanical property of hybrid laser arc weld in 10CrNi3MoV steel was evaluated.Experiments were conducted to compare hybrid laser arc welding(HLAW) to gas metal arc welding(GMAW).The result shows that,hybrid laser arc welding is a suitable process for 10CrNi3MoV steel.Compare to MAG welding process,HLAW welds exhibited much higher hardness and lower impact ductility,and the mechanical property of the HLAW welds meets the qualification.For further improvement of comprehensive mechanical property,approaches such as optimizing welding material component,reducing quench-hardening tendency of the welded joint to improve the joint impact ductility are presented.