Amplifying system for detected signal in transformer burglary prevention

The invention discloses an amplifying system for a detected signal in transformer burglary prevention. The amplifying system for the detected signal in transformer burglary prevention comprises an infrared sensor (J1), a first capacitor (C1), a first audion (Q1), a supply voltage input line (1) and an amplified signal output line (2), wherein the supply voltage input line (1) and the first capacitor (C1) are connected with the infrared sensor (J1), the other end, opposite to the end connected with the infrared sensor (J1), of the first capacitor (C1) is connected with a base electrode of the first audion (Q1), an emitting electrode of the first audion (Q1) is grounded, and the amplified signal output line (2) is connected with a collector of the first audion (Q1). When the amplifying system for the detected signal in transformer burglary prevention is applied to a transformer burglary prevention system, an infrared signal collected by the infrared sensor (J1) is coupled through the first capacitor (C1), then the infrared signal is amplified through the first audion (Q1), therefore, a control system in the transformer burglary prevention system can conveniently make correct judgments, normal application of the infrared transformer burglary prevention system can be ensured, and burglary prevention performance is improved.