The invention relates to an isolation switch which includes a shell, a fracture structure and a transmission structure are arranged in the shell, the transmission structure comprises a rotating shaft,the rotating shaft has a penetrating end located outside the shell, an angle pointer is arranged on the penetrating end, an indicator plate matched with the angle pointer is arranged outside the shell, the indicator plate has an angle indicating area for cooperating with the angle pointer, and a sensor is fixedly arranged on the penetrating end of the rotating shaft. The invention is provided with the angle pointer and the indicator plate at the penetrating end of the rotating shaft so as to be observed on the spot. By analyzing and calculating the rotational signal from the sensor, the rotational angle of the rotating shaft and other related parameters can be obtained, and the open and close states can be judged. The results obtained by the two observation methods can be verified mutually. Moreover, since the angle pointer and the sensor are installed at the same shaft end of the rotating shaft, it is also convenient to carry out uniform installation and repair and replacement.