The work aims to design the structure of driving roller based on the structural optimization technology, so as to improve the structural mechanical performance and increase the working life of the belt conveyor in food packaging production line. Firstly, the structure of the driving roller was analyzed and its mechanics was analyzed. Then, the im-provement of mechanical properties and lightweight design of the roller's wheel disk were carried out via topology opti-mization technology. Secondly, the pre-deformation of the spatial node about the finite element model of the driving roller was conducted based on the HyperMorph, and the shape optimization solution was obtained. The analysis on the optimization results showed that, the compliance of the driving roller reduced from 1340.304 mm/N to 791.1324 mm/N, the first-order natural frequency increased from 849.344 Hz to 980.046 Hz, and the structural mass decreased from 1.235 t to 0.806 t. The optimization results show that, not only does the driving roller structure based on the structural optimization technology effectively improve the static stiffness of the structure, and the enhancement of the first-order natural frequency indicates that the vibration suppression ability is increased, but also the lightweight structure is achieved, which saves the manufacturing cost of the structure. The proposed method provides significant reference for the structural optimization design in modern engineering field.