The invention discloses an electric pressure cooker with an improved seal ring. The electric pressure cooker comprises a pot, a pot cover, a seal ring, and a pressure sensor and a lock catch which are arranged on the pot cover; the electric pressure cooker is characterized in that a deflexed edge is formed on an upper opening of the pot; the pot cover comprises a top plate and peripheral plates, and a location device is arranged on the top plate of the pot cover; the seal ring comprises an inner ring circle, an elastic support plate embedded in the inner ring circle, a lower groove located atradial outside of the inner ring circle, and a horizontal clamping groove arranged in mirror image with the lower groove; the horizontal clamping groove is matched with the location device on the topplate, and the lower groove and the external wall of the horizontal clamping groove are attached to the peripheral plates of the pot cover; and the upper opening and the deflexed edge of the pot are embedded into the lower groove. With the elastic support plate, an axial lower end of the seal ring is closely attached to the pot, and simultaneously, the pot cover tightly compresses the seal ring under the function of the lock catch so as to prevent the seal ring from deformation and maintain excellent sealing performance.