In order to solve the problems in the shaping course of smalldiameter bondi tube with complex form, such as multiple positioning,big process difficulty, low production efficiency as well as high scrap rate etc., the independently researched and developed automatic shaping machine was introduced in which combined mould was used to realize once positioning and push bending and rotating bending were driven by sensor detection, pneumatic system and PLC control. The basic structure of the device was described , the pneumatic systems of the device and the PLC control process were presented.