A three-position switch used for high-voltage electric power equipment, having three sub switches which correspond to three phases, each of the sub switches comprising: a fixed connecting end used for connecting a conductor, and a first movable connecting end used for connecting the conductor and a second movable connecting end used for connecting a grounding line; wherein the first movable connecting end and the second movable connecting end can be simultaneously driven by one drive part to linearly move along respective axes of motion, and the second movable connecting end is not in contact with the grounding line while the first movable connecting end is separated from the conductor; the drive part is driven by a transmission shaft to rotate around the axis of the transmission shaft ; and the transmission shafts of the three sub switches are coaxially connected in an anti-torsion manner, characterized in that each of the sub switches is provided with an independent shielding shell , a transmission hole for the transmission shaft to pass through is formed in the shielding shell , two transmission shafts connecting two sides and two transmission holes are provided in the sub switch in the middle, and the transmission shafts of two adjacent sub switches are connected through a connecting part , wherein the connecting part comprises a hexagonal shaft and a hexagonal hole which match each other, wherein the hexagonal shaft is received in the hexagonal hole , wherein the hexagonal shaft and the hexagonal hole are provided with internal splines at the other ends, and are in anti-torsion cooperation with the transmission shafts of the sub switches at two sides through the internal splines , so that the transmission shafts and the drive parts of the three sub switches are connected to synchronously rotate. a fixed connecting end used for connecting a conductor, and a first movable connecting end used for connecting the conductor and a second movable connecting end used for connecting a grounding line; wherein the first movable connecting end and the second movable connecting end can be simultaneously driven by one drive part to linearly move along respective axes of motion, and the second movable connecting end is not in contact with the grounding line while the first movable connecting end is separated from the conductor; the drive part is driven by a transmission shaft to rotate around the axis of the transmission shaft ; and the transmission shafts of the three sub switches are coaxially connected in an anti-torsion manner, characterized in that each of the sub switches is provided with an independent shielding shell , a transmission hole for the transmission shaft to pass through is formed in the shielding shell , two transmission shafts connecting two sides and two transmission holes are provided in the sub switch in the middle, and the transmission shafts of two adjacent sub switches are connected through a connecting part , wherein the connecting part comprises a hexagonal shaft and a hexagonal hole which match each other, wherein the hexagonal shaft is received in the hexagonal hole , wherein the hexagonal shaft and the hexagonal hole are provided with internal splines at the other ends, and are in anti-torsion cooperation with the transmission shafts of the sub switches at two sides through the internal splines , so that the transmission shafts and the drive parts of the three sub switches are connected to synchronously rotate. <EOS>