Abstract: 4GQ-1C sugarcane harvester was designed to solve current problems that large and medium-sized sugarcane harvesters were in low adaptability in sloping land，small row spacing and small plots of areas sugarcane harvesting.In order to verify adaptability and reliability of 4GQ-1C sugarcane harvester，field tests were carried out compared with existing models.Results showed that 4GQ-1C sugarcane harvester has good operation performance of lower impurity rate and loss rate of sugarcane，stronger harvesting adaptability in small row spacing areas and more convenient in collecting sugarcane comparing with sugarcane harvesters with power of 132 and 194 kW.Furthermore，4GQ-1C sugarcane harvester is compact and flexible with good adaptability and good harvest effect in sugarcane growing area with small and medium-sized planting scale，it is worth popularizing and applying in sugarcane harvest.