Abstract: The simulation of aluminum alloy plate tungsten inert gas welding (TIG) process using finite element software-ABAQUS was researched.Firstly,the welding temperature field was calculated using elliptical surface Gaussian distributions as the input heat source.The highly non-uniform welding temperature file caused large residual stress and deformation in the welding plate.The welding residual stress of the welded plate was predicted after it cooled down.The results of prediction and actual measured were contrasted finally.Results are verified the applicability of the welding simulation.