The invention discloses a high-voltage electric rice cooker and a using method thereof. The high-voltage electric rice cooker comprises a pot body, a thermal insulation cover and a liner which is arranged in the pot body, wherein a main control circuit board and a heating plate are arranged at the lower part of the inside of the pot body, and a main display and a plurality of main control keys arearranged on the outer side wall of the pot body; the main display, the heating plate and the plurality of main control keys are respectively and electrically connected with the main control circuit board, and a pre-filled water box and a stirring part are arranged at the lower end of the thermal insulation cover. A motor drives a stirring rod to rotate, accordingly, on the one hand, rice grains clinging to the liner can be stirred, so that the lower ends of the clingy rice grains are soaked with water, and cannot be burnt by boiling; on the other hand, the rice can be smoothed out, so that the problem that the rice is high at one side and slow at the other side is solved without manually smoothing out the rice.