The invention discloses a pressure power-off device and an electric pressure cooker comprising the same; the device comprises a base; the base is provided with a moving contact-piece and a static contact-piece which is used for electric connection; the moving contact-piece is provided with an elastic piece which is abutted on the static contact-piece in an elastic mode; the base is provided with a swing member which rotates and separates a linkage elastic piece and the static contact-piece and a torsion spring which links the swing member to rotate; the base is provided with a clamping block which is used for clamping and connecting the torsion spring and making the torsion spring to store energy and a pushing piece which pushes the torsion spring to disengage from the clamping block; the pushing piece is abutted on the torsion spring; when the pushing piece is gradually lifted, the clamping positions of the torsion spring and the clamping block gradually shift up and finally disengage the clamping and connecting relation; meanwhile, the torsion spring releases elastic potential to quickly push the swing member and then the swing member links the elastic piece so that the elastic piece generates elastic deformation and the electric connection relation between the elastic piece and the static contact-piece is disengaged. according to the process, the linear movement process of the pushing piece is converted into the abut position gradual changing process of the torsion spring and the clamping block; quick and accurate power off is performed on electric appliance.