Abstract: Stress analysis for buried pipelines by using mechanical analysis modules of ANSYS software is non-intuitive for modeling process and low efficiency. Instead, a model for stress analysis of buried pipelines is established by using the Winkler elastic footing beam theory. The model is used in re-development of ANSYS software by VC to highlight calculation equation for soil spring theory in modeling. As for key interfaces during such re-development, parameterized modeling is deployed to construct the model for stress analysis of buried pipelines. In addition, the entire modeling process is encapsulated. This paper presents the principles of re-development of ANSYS and the technique for re-development based on parameterized design language, APDL, and also provides the specific encapsulation processes and calling procedures. Application shows that the software is easy to operate and improves the efficiency of stress checking for buried pipelines.