Objective　The　geometric　configuration　of　the　intraventricular　tunnel　is　related　to　the　re-intervention　of　left　ventricular　outflow　tract　stenosis　after　double　outlet　right　ventricle　(DORV)　correction.　Hemodynamic　simulation　was　performed　in　order　to　study　the　influence　of　the　geometric　configuration　of　the　IVT　on　the　pressure　difference.　Methods　CT　images　of　DORV　were　processed　to　reconstruct　3D　models　of　left　and　right　ventricular　flow　chambers　and　aortic　valve　orifice,　and　then　the　size　and　relative　position　of　the　aortic　valve　orifice　and　ventricular　septal　defect　were　determined.　Twenty　five　groups　of　the　idealized　models　were　established　according　to　orthogonal　test　design　and　computational　fluid　dynamics　method　was　applied　to　simulate　hemodynamics.　Three　factors　of　geometric　configuration　were　considered　for　the　study　of　their　influences　on　the　pressure　difference.　The　first　factor　is　the　distance　between　the　ventricular　septal　defect　and　the　plane　of　the　aortic　valve　(D-SA),　the　second　factor　is　the　ejection　angle　of　blood　from　left　ventricle　flowing　into　the　IVT　(A(LT)),　and　the　third　factor　is　the　turning　radius　of　the　IVT　(R-TT).　SPSS　software　was　employed　to　perform　the　orthogonal　analysis.　Additionally,　twelve　models　with　different　turning　radii　were　established　for　hemodynamic　analysis,　with　the　turning　radii　increasing　from　0　mm　with　an　interval　of　1　mm,　so　as　to　study　the　influence　of　turning　radius　on　pressure　difference　of　IVT.　Results　The　analysis　of　variance　showed　that　only　the　change　of　R-TT　had　a　significant　effect　on　the　pressure　difference　(P　=　0　＜　0.05),　while　the　change　of　D-SA　and　A(LT)　had　no　significant　effect　on　the　pressure　difference　(P　=　0.459　＞　0.05,　P　=　0.263　＞　0.05).　The　pressure　difference　decreases　with　the　increase　of　R-TT.　When　R-TT　reaches　6　mm,　the　pressure　difference　gradually　remains　unchanged　with　the　increase　of　R-TT,　and　the　rate　of　change　is　less　than　5%.　Conclusion　R-TT　in　the　IVT　is　the　main　factor　affecting　the　pressure　difference.　A　small　R-TT　will　lead　to　a　large　pressure　difference　in　the　IVT.　When　R-TT　increases　to　6　mm,　the　pressure　difference　in　the　IVT　remains　nearly　unchanged.　When　performing　the　right　ventricular　double　outlet　correction;　the　turning　radius　of　the　IVT　should　be　about　6　mm　to　ensure　relatively　small　pressure　difference.