Abstract: To address positioning errors and collision risks of ITER edge correction coils caused by center-of-gravity eccentricity, this paper presents a finite-element-based support structure optimization method. Using a high-precision SCC C-ring model, three strategies are applied: Eccentricity compensation, integrated guide stiffness design, and hoisting load matching. Results show Z-direction error reduced to ±0.8 mm, lateral stiffness increased by 66%, load unevenness decreased to 9.2%, satisfying ITER installation and safety requirements.