The invention belongs to a peanut harvester. The peanut harvester comprises a rack body, and a transmission device and walking wheels are arranged on the rack body. The peanut harvester is characterized in that a picking mechanism is arranged at the front end of the rack body, a peanut and stem separation mechanism is arranged on the rack body behind the picking mechanism, and a residue removal mechanism and a peanut collection box are arranged on the rack body behind the peanut and stem separation mechanism; a vibration screen is arranged below the peanut and stem separation mechanism and theresidue removal mechanism and provided with a feeding end and a discharging end, the peanut and stem separation mechanism is arranged at the feeding end of the vibration screen, the discharging end is provided with a material residue removal lifting device, and the other end of the material residue removal lifting device is connected with the peanut collection box. Compared with the prior art, the peanut harvesting efficiency and the residue removal efficiency are improved, the quality of harvesting the peanuts is improved, the moisture content rate of the peanuts is lowered, and the labor intensity of harvesting the peanuts is lowered.