Abstract: In order to provide a reference for promoting technology of sugarcane mechanical harvest, the experiments which used by mechanical harvest and manual harvest were contrasted to study the effect of sugarcane mechanical harvest on the growth of ratoon cane and stubble sugarcane quality. The results showed that stubble sugarcane quality of mechanical harvest was better than manual harvest, which concrete manifestation was that the depth of mechanical harvest was under ground or low cut on ground, and stubble height and perennial root of rupture rate of mechanical harvest was significantly lower than manual harvest. Emergence rate of stubble sugarcane from mechanical harvest was lower than manual harvest, but there was no influence on stool capacity of stubble sugarcane. Plant height, effective plant number per unit area and yield which used by mechanical harvest was equal to manual harvest, stalk diameter of mechanical harvest was slightly better than manual harvest, and sucrose content of mechanical harvest was 0.03%~0.49% higher than manual harvest.