目的 通过对推动臂结构尺寸进行优化设计，得到在提高推动臂工作性能和力学性能的前提下减小质量的最优方案。方法 以推动臂的质量为优化目标，以推动臂受到的压力大小为约束条件，以推动臂的结构尺寸为优化设计参数，建立优化的数学模型。应用Workbench的多目标驱动优化工具结合多目标遗传算法的理论对推动臂的结构尺寸进行优化设计。结果 通过优化分析，结果表明，优化后模型的等效应力极大值减少了23.08%，结构总质量减少了7.42%。结论 通过对不同结构尺寸在其约束条件下的研究分析，达到了最优结构尺寸下推动臂工作性能和力学性能更优、部件总质量更小的目的，为以后粘箱机的结构优化设计提供了思路和参考。

The paper aims to obtain the optimal scheme for reducing the mass while improving the working and mechanical properties of the push arm by optimizing the structural dimensions of the push arm. Taking the mass of the push arm as the optimization goal, the pressure of the push arm as the constraint condition, and the structure size of the push arm as the optimization design parameter, the optimized mathematical model was established. The multi-objective driven optimization tool of Workbench was applied to optimize the structural size of the push arm in combination with the theory of multi-objective genetic algorithm. Through optimization analysis, the results showed that the equivalent stress maximum value of the optimized model decreased by 23.08% and the total mass of the structure decreased by 7.42%. Through the research and analysis of different structure sizes under their constraints, better working and mechanical properties of the push arm are achieved under the optimal structure size. The total mass of the components is smaller. It provides ideas and reference for the structural optimization design of the box adhesive machine in the future.