Abstract: Excellent structural design can reduce vibration and shock impact on the equipment in its operational environment, effectively protecting the delicate internal electronic components and ensuring long-term stable performance。This paper conducts a the mechanical performance analysis and optimization design of a sheet metal chassis。Firstly, the optimization objectives and the inherent vibration characteristics of the chassis were clarified through simulation analysis。Subsequently, measures such as weight reduction of the heat sink and reinforcement of the chassis baseplate were implemented, significantly reducing the stress on the main chip。This topology optimization method, obtaining an optimal solution that meets design requirements and possesses considerable practical value。