Quality control is very important in the manufacturing process of cold tube-bending, but most of enterprises can only verify tube quality by the tube bending machine. Based on the platform of commercial software, an integrated system on CAD/CAPP/CAE for bending tube in power plants boiler is developed. The system is carried on re-development under the VC++ language environment, and data is transferred in Pro/E, Ansys and designing module through a reasonable data structure and interface. So we can share data and realize flexibility and standardization of the processing. The application result indicated that the integrated system can offer a whole set of solution from building a CAD model, forecasting tube bending quality and structure optimization by CAE methods to programming CAPP processes.