Audio frequency switches early warning system

The utility model relates to an audio frequency switches early warning system, include: single -pole double throw analog switch, single -pole double throw analog switch's the first audio frequency passageway of public nodal connection, wherein movable contact passes through grounding all the way, movable contact connects output and second audio frequency passageway through the blocking capacitance who establishes ties all the way in addition, and second audio frequency passageway is connected simultaneously to the output, be connected with early warning device between control node and the treater. Single -pole double throw analog switch carries out the gate control to first audio frequency passageway, and when realizing an effective isolation audio signal, ground resistance that can be through the single -pole double throw analog switch intercommunication is not with this noise ground of releasing to the effective isolation to the 2nd audio signal has been realized, increased early warning device simultaneously, when single -pole double throw analog switch's closed emergence was unusual, early warning device sent the alarm suggestion.