Abstract: In order to reduce the trash content of the whole stalk sugarcane harvester, to meet the sugar-refinery requirements of sugar mill, the equipment of the header, equipment of cleaning element, equipment of severed tail in SJ-1600 whole stalk sugarcane harvester was improved and sugarcane-leaves separation devices was added at its tail in this article. The prototype has been machined based on technical improvement and the contrast test was conducted in the field. The results showed that when the speed of delivery wheel was 280 r/min and the speed of cleaning wheel was 750 280 r/min, the effect of cleaning was the best; trash content of SJ-1600 whole stalk sugarcane harvester after improving was 4.0%, and that decreased 3.2% than before improving, and it could meet sugar-refinery requirements for sugarcane. It can provide reference for the mechanical design of the whole stalk sugarcane harvester.