Thin-walled　parts　have　the　low　stiffness　characteristic.　Initial　residual　stress　of　thin-walled　blanks　is　an　important　influence　factor　on　the　machining　stability.　With　the　different　machining　paths,　the　release　order　of　initial　residual　stress　is　also　different　so　as　to　cause　the　different　deformation　of　the　workpiece　at　the　end　of　machining.　The　present　work　outlines　machining　path　research　of　thin-walled　parts　with　initial　residual　stress.　According　to　residual　stress　test　by　hole-drilling　method　for　casting　ZL205A　aluminium　alloy　tapered　thin-walled　blank,　the　three-dimensional　finite　element　model　with　initial　residual　stress　is　established　to　study　the　deformation　of　the　thin-walled　part　in　three　machining　paths.　The　results　indicate　that　the　deformation　of　workpiece　in　semicircle　path　is　similar　to　that　in　straight　path.　The　deformation　in　contour　path　is　minimal.　©　2020　Inderscience　Enterprises　Ltd..　All　rights　reserved.