Abstract: During the conceptual design phase of crane telescopic booms, traditional finite element analysis methods suffer from low efficiency due to the need for repeated manual model adjustments, making it difficult to meet the rapid development requirements of serialized products. To address this issue, this study proposes a parametric modeling approach based on ANSYS APDL, using the QY20 truck crane telescopic boom as the research subject. Through structural analysis, stress concentration areas such as the boom head and tail were appropriately simplified while preserving key mechanical characteristics to establish a parametric model. By defining parameters including cross-sectional dimensions, plate thickness, and boom section lengths as design variables in APDL, full-process automation from model updating and meshing to solution analysis was achieved. Comparative analysis between the parametric model and the original model under typical working conditions validated that the proposed method maintains good computational accuracy in stress distribution, maximum stress location, and deformation characteristics, with errors remaining within acceptable engineering tolerances. The research demonstrates that this approach significantly improves computational efficiency while ensuring reliable analytical results, effectively reducing repetitive modeling time and providing a practical technical solution for the rapid design and structural optimization of serialized telescopic boom products.