The practice of lightweight parts is an important research direction in the field of mechanical manufacturing. In this study, the suspension column of the Formula Student Combustion China (FSCC) BTR-X was taken as an example. Based on the analysis of its actual force, the Altair inspire form software was employed to perform weight reduction design and topology optimization with the goal of maximizing stiffness. The stress, strain values and safety factors of two different design schemes were obtained under the condition of entering the bend with brakes, and then their advantages and disadvantages were compared. In the best optimization scheme obtained, the maximum effective stress of the BTR-X suspension column was 557.4 MPa, and the weight was reduced by 18.4% , thus improving the stability of the vehicle. Accordingly, the lightweight goal was achieved, which has certain reference value for further improving the performance of FSCC racing cars. Finally, the 3D printing molding process of the optimized suspension column structure has been successfully realized by selective laser sintering (SLS), providing a new route for the lightweight design and processing of FSCC racing cars.