The invention discloses an electric pressure cooker, which comprises a cooker body, a cooker cover, a pressure limiting valve and a driving mechanism for driving the pressure limiting valve, wherein the cooker body comprises an outer pot and an inner pot which is arranged in the outer pot; the inner pot is used for accommodating cooked foods and a heating piece, which is used for heating the inner pot, is arranged in the outer pot; the cooker cover is arranged on the cooker body; an exhaust mechanism, which communicates with the interior of the inner pot, is arranged on the cooker cover, and diameter of the exhaust passage is within a range from 3.3mm to 30mm; the pressure limiting valve is movably arranged at the upper side of the exhaust passage so as to open or seal the exhaust passage; the inner pot is heated by the heating piece and the pressure limiting valve, which is driven by virtue of the driving mechanism, is used for sealing the exhaust passage so as to increase pressure in the inner pot and to keep the pressure in the inner pot at a rated pressure when the electric pressure cooker is under a boosting mode; and the inner pot is heated by the heating piece and the pressure limiting valve, which is driven by virtue of the driving mechanism, is used for opening the exhaust passage so as to release the cooking pressure in the inner pot when the electric pressure cooker is under a buck mode. With the application of the technical scheme provided by the invention, problems in the prior art that an electric pressure cooker are long in cooking duration and complex in operating steps of flavoring and thickening are solved.