Abstract: In order to obtain design basis for harvesting parts of Pinellia ternata harvester，a measuring device for recovery coefficient of Pinellia corm collision was established.Mixed orthogonal test and single factor test were carried out on material thickness，drop height，pinellia mass，and crash material of various factors affecting crash recovery coefficient.Test results showed that effect of collision material and quality of Pinellia ternata were significant，and effect of drop height and material thickness were not significant.Single factor test showed that collision recovery coefficient decreased with increase of Pinellia ternata mass，and recovery coefficient of rubber was smaller than that of Q235 steel.In the field test，damage rate of Pinellia ternata was 3.53% when material was Q235，and damage rate was 2.19% when material was rubber.When mass of Pinellia ternata tuber was 4~6 g，damage rate of Pinellia corms was 4.80%，and when mass of Pinellia ternata tuber was 1~3 g，damage rate of Pinellia corms was 3.20%.It could provide reference for design and optimization of working parts of Pinellia ternata harvester.