Abstract: In order to solve the problems of no adaptive machine type and shortage of power with a small hand tractor when potato digger working in hilly and mountainous area in China, a vibrating potato digger with shovel and sieve was designed, which can reduce resistance and improve the efficiency of separation. The rear of digging shovel was designed grid-shaped, the inclination angle of separating sieve rack increases from the inside to the outside to enlarge its working area. The vibration amplitude and angles of digging shovel can be adjusted with hinge four-rod swinging mechanism and combined eccentric wheel. Field test results showed that the digger has well separation effect, the obvious rate was 96.2%, the cleaning rate was 97.8% and the damage rate was less than 3.9%. With the forward speed is 0.34 m/s, the average traction resistance is 1 498 N when no vibration, however, the average traction resistance are 1 204 N and 995 N when the amplitude are 4 mm and 8 mm respectively, and the frequency is 14 Hz. The results indicated that vibrating shovel can reduce traction resistance and improve separation efficiency, all the performance indexes of the designed digger meet the operation requirements.