The invention relates to an improved electric pressure cooker, which comprises an outer pot, an inner pot, a cover and a sealing ring for closing the inner pot, an electric heating device arranged at the bottom of the inner pot, a control circuit for controlling the work of the electric heating device, and a displacement transfer piece generating displacement changes along with the changes of cooking pressure, wherein the control circuit comprises a capacitance sensor for detecting the changes of the cooking pressure; the displacement transfer piece can drive a pole piece of the capacitance sensor to act, and the capacitance sensor is a combined capacitance sensor provided with three capacitor plates; and two signals are generated among the three capacitor plates to detect the changes of the pressure state of the electric pressure cooker. The improved electric pressure cooker improves the pressure control precision of the electric pressure cooker and improves cooking tastes of foods.