Abstract: By exploring soil aggregates and their importance to soil structure and crop growth, and addressing the problems with existing soil particle analyzers, a soil particle analyzer is designed, including mechanical body, driving device, control system, crank slider mechanism, screening component, and limit device. By optimizing the driving device, crank-slider mechanism, and screening components, we ensure stable vertical movement of the screening components, effectively preventing shaking during the screening process. The driving device is positioned in the upper area of the screening component to minimize the risk of accidents during analyzer usage. Through testing soil samples, we have verified that the analyzer exhibits excellent stability and accuracy. This research achievement holds significant importance in enhancing soil analysis technology, ensuring test result reliability, and offering robust support for scientific research and technological applications in related fields.