Abstract: Based on the characteristics of Pinellia Ternate Breite(PTB) planting, the sizes and distribution of PTB in the soil, the overall structural layout of 4SB-800 PTB harvester matched with TN-55(or JDT-654) tractor was determined. Also, the design and related engineering analysis for the main working parts of 4SB-800 PTB harvester were demonstrated. All of these are valuable not only for the design of PTB harvester but also for the design of other tuber plant harvesters.