The invention discloses a self-propelled and turnable lotus root harvester. The self-propelled and turnable lotus root harvester comprises spiral propelling rollers, a frame, clutches, a reduction box, a water pump, a water pipe, handles, a flow jet device and the like. When the self-propelled and turnable lotus root harvester is used, the power output of a diesel engine is transmitted to the reduction box through a belt and transmitted to transmission shafts connected with the spiral rollers through the belt so as to drive the whole harvester to move; turning is achieved by the matched clutches, that is to say, when the harvester needs to turn into the corresponding direction, the clutch handle in the corresponding direction is clenched to lower the rotation speed of the transmission shaft on the corresponding side so as to achieve differential turning.