This　paper　proposes　an　integrated　geometric　error　prediction　and　compensation　method　to　eliminate　the　positioning　inaccuracy　of　tool　ball　for　a　double　ball　bar　(DBB)　caused　by　the　translational　axes＇　geometric　errors　in　a　multi-axis　machine　tool　(MAMT).　Firstly,　based　on　homogeneous　transform　matrix　(HTM)　and　multi-body　system　(MBS)　theory,　the　positioning　error　model　only　considering　the　translational　axes　of　a　MAMT　is　established.　Then,　an　integrated　error　parameter　identification　method　(IEPIM)　by　using　a　laser　interferometer　is　proposed.　Meanwhile,　the　identification　discrete　results　of　geometric　error　parameters　for　the　translational　axes　are　obtained　by　identification　experiments.　According　to　the　discrete　values,　the　optimal　polynomials　of　18　position-dependent　geometric　errors　(PDGEs)　are　founded.　As　a　basis,　an　iterative　compensation　method　is　constructed　to　modify　the　NC　codes　generated　with　the　ordinary　compensation　method　in　self-developed　compensation　software.　Finally,　simulation　verification　is　conducted　with　these　two　compensation　methods.　Simulation　results　show　the　positioning　errors　for　test　path　of　tool　ball　calculated　with　the　iterative　compensation　method　that　are　limited　within　0.001　mm,　and　its　average　accuracy　and　accuracy　stability　are　improved　by　79.5　and　52.2%,　respectively.　In　order　to　further　verify　the　feasibility　of　the　presented　method,　a　measuring　experiment　is　carried　out　in　XY　plane　of　a　five-axis　machine　tool　by　using　DBB.　The　experiment　results　show　that　the　maximum　circularity　error　with　the　iterative　compensation　method　is　reduced　about　40.4%　than　that　with　the　ordinary　compensation　method.　It　is　therefore　reasonable　to　conclude　that　the　proposed　method　in　this　paper　can　avoid　the　influence　of　the　translational　axes＇　geometric　errors　on　rotary　ones　during　a　DBB　test.