The utility model discloses a high-voltage disconnecting switch special program lock. The high-voltage disconnecting switch special program lock is characterized in that the high-voltage disconnecting switch special program lock comprises: a lock shell, wherein the lock shell is further provided with a lock hole; a lock core, wherein the lock core is installed in the lock hole; a cam plate, wherein the cam plate is installed on the top end of the lock core; a lock tongue, wherein the lock tongue is connected with the lock shell; a limit mechanism, wherein the limit mechanism is installed on the vertical surface of the lock shell; a microswitch, wherein the microswitch is installed on the bottom surface of the lock shell; a screw, wherein the screw is connected with the lock tongue; a tension spring, wherein the tension spring is connected with the lock shell and the screw separately; and a lock cover, wherein the lock shell is connected with the lock cover. Through the above method, the high-voltage disconnecting switch special program lock of the utility model adopts the pure mechanical design, so the linkage problem among a disconnecting switch, a door and a vacuum contactor can be solved, advantages of easy operation and reasonable structure can be realized, no electricity is needed, and the consumption of energy sources and materials can be reduced.