Abstract: According to the characteristics of peanut cultivation, the authors have succeeded in developing the 4HQL-2 type whole-feed peanut combine that is suitable for main peanut producing areas of China by the original design experience. The combine has been utilized the working principle of combining digging and lifting. To keep the effect and stability of digging, we designed a new kind of combination device for digging and lifting. The clamping conveyor was designed based on the three-belt(ordinary V-belt) clamping principle for the first time, so it can lower the rate of peanut’s falling to a large extent by flexible clamping manner; The removing soil mechanism can sway up and down to remove soil, so it can keep high efficiency and low harvest loss. The peanut picking part used whole-feed approach and throw-snap working principle can improve the purity rate of picking off the wet peanut. The cleaning mechanism design adopted the combination of wind-sieve selection and the reverse swing of separator riddle and screen riddle can reduce the vibration of the whole machine. The field performance tests and application showed that the combine has complied with the design requirements, and works well. The parameters of the field performance tests are as follows: peanut picking rate ≥99.6%, total loss rate ≤3.3%, picking breakage rate ≤2.0%, peanut impurity rate ≤2.2%. So the combine has complied with the design requirements and relevant standards, and passed appraisal of the Ministry of Agriculture of China.