The invention relates to a static contact assembly and a disconnecting switch using the same. The static contact assembly comprises a static contact and a static contact base for installation of the static contact. A spring device that is used for providing a buffering force for a moving terminal assembly when the moving terminal assembly and the static contact are in a closing sate and providing an opening force for the moving terminal assembly when moving terminal assembly and the static contact are in an opening state is arranged at a moving path of the moving terminal assembly at the static contact base or static contact. The spring device provides a jacking force for a moving contact during the closing process of the static contact and the moving contact, so that the impact force of closing between the moving contact and the static contact is reduced or cancelled out. Meanwhile, when the moving contact and the static contact are in an opening state, the spring device provides the opening force for the moving terminal assembly for separation from the static contact, so that the moving contact and the static contact are separated by the opening force provided by the spring device when the opening signal is sent out and the output force of an operating mechanism is not sufficient. Therefore, a problem that the clamping force between the moving contact and the static contact can not be cancelled by the output torque of the operating mechanism at the initial stage of the opening is solved.