Abstract: In order to investigate the operation process and performance of plant lifting of 4HLB-2-type peanut combine harvester, the motion analysis of the plant lifting device was carried out to explore the influence of motion parameters and location configuration parameters of all parts on plant lifting effect, and the field experimental verification was performed subsequently. According to the motion analysis, when the design parameters of vine uprearing device obliquity was 80°, clamping chain obliquity was 35°, vine uprearing speed ratio was 1.5, chain speed ratio was 1.2 and so on, peanut plant was nearly perpendicular with the clamping chain, and the pulling force of clamping chain was nearly directed in up-vertical orientation. Based on the analysis of the peanut vine uprearing motion process, the calculation methods of the vine uprearing times and the maximum active uperaring fingers for individual peanut plant were determined, and the separation distance of uprearing fingers optimized was 150 mm. The theoretical analysis also involved the influence of the location relation of vine uprearing device, digging shovel and clamping chain on the peanut plant lifting performance. And the main location parameters in the side view of the three parts were determined. Field tests showed that the motion parameters and location configuration of all parts can meet the performance requirements of peanut plant lifting, and the practical process and status of plant lifting were in agreement with the results of theoretical analysis. This paper provides a reference for improvement of structural design and optimization of working parameters in same type device.