Abstract: To address the transportation challenges of large-volume, heavy-duty tower materials for mountainous transmission lines with complex road conditions, this study proposes a sliding-motion-based transport vehicle body. SolidWorks software was employed to create a 3D model of the vehicle. Through numerical analysis and control variable methods, the stress distribution under three operational modes—stationary, rotating, and walking—was systematically analyzed. Finite element analysis confirmed that the structural strength of the integrated mechanism met transportation requirements under all conditions. Results indicate that the stress during independent walking exceeds that during rotation or stationary states, yet remains below the material"s allowable stress threshold.