To address the issue that the interior point method exhibits strong dependence on weighting parameters when optimizing the placement points of hydraulic cylinders in a folding steering mechanism, resulting in highly subjective optimization outcomes and difficulties in effectively reconciling conflicting objectives, this paper introduces the NSGA-II multi-objective optimization algorithm. This aims to achieve comprehensive optimization across multiple key metrics, thereby enhancing the overall performance of the steering system. The parametric distances a, b, c, and d between multi-stage hydraulic cylinder placement points and the hinge points of the articulated steering structure are defined as design variables. The optimization objectives are minimizing the stroke difference, torque difference, and peak output force of the hydraulic cylinders. The NSGA-II algorithm is employed to obtain a Pareto solution set, from which the optimal layout scheme is selected using the ideal point method. To validate the optimization efficacy, the interior point method was employed as a comparative approach. Weight coefficients for each optimization objective were determined using the entropy weight method, converting the problem into a single-objective optimization for solution. The optimization outcomes of both approaches were measured against the baseline initial scheme. Comparative results indicate that, relative to the initial scheme, the NSGA-II-optimized scheme reduces stroke difference, torque difference, and peak hydraulic cylinder force by 4.56%, 5.15%, and 6.02% respectively. Although the interior point method reduced stroke deviation and peak hydraulic cylinder force by 2.99% and 1.49% respectively, its limitation to single-objective optimization resulted in a 5.49% increase in peak torque deviation, failing to achieve overall optimization. Comprehensive performance comparisons demonstrate that NSGA-II delivers superior results overall, achieving synergistic multi-objective optimization that effectively enhances steering stability and reduces energy consumption. Field trials confirmed the prototype''s minimum turning radius of 241 cm, outperforming the comparable Dongfeng MH804M tractor for hilly terrain. This performance fundamentally ensures the prototype meets steering requirements for vehicles operating in hilly and mountainous conditions.