The invention relates to a self-reset type overvoltage and undervoltage protection structure which comprises a moving contact, a moving contact bracket, a static core 1, a coil frame 1, a DC coil 1, a DC coil 2, a pressing spring 1, a static core 2, a magnetic yoke, a coil frame 2, a magnetic conductive plate, a pressing spring 2, a moving core, a left tension spring, and a right tension spring. When a line is in an overvoltage or undervoltage state, the DC coil 1 does not work, the DC coil 2 is instantaneously turned on and conducted, a generated magnetic field attracts the moving core, the moving core moves rightward to press the pressing spring 1 and the static contact to close and the moving contact is pushed, thus the moving contact is allowed to counterclockwise rotate for a certain angle around a spring pass dead spot position on the moving contact bracket, the spring passes a dead spot, finally a disconnection state is maintained, and the moving core returns to an original position under the reverse elasticity of the pressing spring 1, and vice versa. The self-reset type overvoltage and undervoltage protection structure is mainly used in a self-reset type overvoltage and undervoltage protector, the magnetic field generated by the coil is used to drive the moving core, thus the moving core pushes the moving contact, and the connection and disconnection of the moving contact and the static contact are realized.