<p>To address the current limitations in multiscale analysis of off-axis tensile behavior in 2.5D woven composites, this work employs a novel multiscale approach. This strategy comprises two phases: mechanical property transfer and critical load transfer. For the mechanical property transfer stage, this work established a three-scale finite element model. To reproduce damage at critical locations within the component, progressive damage models are developed for carbon fiber, resin, and fiber bundles, respectively, with numerical implementation achieved using UMAT. Compared with experimental data, the analysis method exhibits a prediction error of 4.31% for stiffness and 6.89% for strength. Furthermore, analysis reveals that failure under off-axis tension in 2.5D woven composites is primarily driven by longitudinal breakage of the warp yarns, with varying degrees of damage stemming from stress redistribution caused by the off-axis angle. This work provides a reference for optimizing the load-bearing capacity of 2.5D woven composites.</p>