Box ZLM50E gearbox design and finite element analysis Abstract: ZLM50E transmission in China in recent years the use of relatively broad. This gearbox for ZLM50E-loader, and through the advance and retreat third gear third gear for the loader to provide the necessary road speed. Box is designed to be an essential part of the gearbox. Although such operation in the box on the more mature, but still there are flaws in the design. For example, too much stress on the box, leading to box and use the life expectancy of lower performance. With finite element analysis of maturing, it has penetrated into all fields, so we can use finite element analysis to improve the box and found the design flaws, and optimize the box. Among the specific work as follows: 1. ZLM50E gearbox familiar with the structure, Analysis and load the relevant calculation. 2. Box 3-D modeling. 3. Finite element analysis of the box. 4. Optimization of the proposed cabinet. Key words: ZLM50E gearbox finite element analysis loader Converter