The potato harvester is designed and manufactured with the patent technology of proprietary intellectual property rights. A digger blade with adjustable row spacing, potato and soil separation mechanism, potato seedling separation mechanism, and potato tuber collection and laying device are added to separate potato and soil, and potato seedlings, collect and lay potato tuber, increase the obvious rate of potatoes, greatly decrease the damage rate of potatoes and obviously enhance production rate.It integrates potato and soil separation technology; potato seedling separation technology; digging depth control technology; collecting, cleaning, skin breaking comprehensive control technology; a combination of mechanical and electrical hydraulic technology; It developed the harvester integrating gullying, digging, conveying and separation, stem and vine separation and collection and laying. The potato harvester is in a novel structure, connected firmly, convenient for dismounting, obtains few repair feedbacks and reliable in performance.