The　rotor　and　stator　were　major　components　of　the　opposed　biconinal　cone　screw　high　pressure　seawater　hydraulic　pump,　which　precision　of　design　and　manufacture　was　particularly　high,　and　the　combining　status　between　the　stator　and　rotor　has　a　significant　impact　on　the　performance　of　the　new　type　pump,　so　the　related　research　on　above　problems　are　carried　out.　In　order　to　satisfy　the　demands　of　design　efficiency　and　manufacture　decision,　a　fast　and　simple　way　was　presented　to　model　3D　cone　screw　and　bushing.　Three-dimensional　space　Cartesian　coordinates　of　cone　screw　and　bushing　profile　with　MATLAB　programming　were　obtained　according　to　the　cone　screw　and　bushing　surface　equation　and　the　design　parameters,3D　curves　of　cone　screw　and　bushing　with　MATLAB　were　rendered,　and　the　feature　point　space　coordinates　were　imported　to　Pro/Engineer　so　as　to　build　cone　screw　and　bushing　solid　model.　Finally,　making　virtual　assembly　and　checking　interference　on　the　screw　and　the　bushing　were　necessary.　The　proposed　method　can　make　the　complex　3D　modeling　more　accurate,　feasible　and　efficient.　©　(2013)　Trans　Tech　Publications,　Switzerland.