This machine is mainly used for the harvest of potato,garlic,pachyrhizus,peanut and other subterranean rootstalk crops with the advantages including high-working efficiency,lower breakage rate,light&quick running without vibration,no jamming and simple structure as well as long useful life. In addition, this machine has been granted with two patents including utility model and outline design. The technical paraments for this machine is as follows: Model 4U-3 Row number Double row(self-loading) Row spacing(cm) 55-80 Productivity(mu/hr) 8-15 Total weight(KG) 1200 Matching power(HP) 70-120 Working depth(cm) 25 Working width(m) 1.65 Potato-exposing rate >96% Breakage rate <2% REV of power take-off shaft(RPM) 560 Overall dimension(cm) 330*390*310 Packing size(cm) 320*200*130