Abstract: To solve the problem of delayed production research and development resulted from repeated designs and manufacturing in the process of manufacturing prototype caused by the large size,great quality,a large quantity of parts,poor assemblability and manufacturability of the conveying device of traditional sugarcane harvesters.The pattern of design for manufacturing and assembly （DFMA） was applied in the course of the research and development of the conveying device of the new generation of light traditional sugarcane harvesters,developing product design and process design in parallel,fully considering the downstream parties associated factors such as manufacturing,assembly,and so on.Based on the KISS principle,the primary design of the important parts was measured by DFA index as the measurement tool.It was optimized and redesigned based on the result of the measurement.Practice results showed that with DFMA,the mass of the conveying device assembly can be reduced by 12.21% and the design and manufacturing cycle can be shortened by 5%.The two prototypes produced in small scale were assembled qualifiedly at the first try and put into use in the crushing season.This practice is of certain significance for the research and development,and optimization of sugarcane harvesters.