Amplitude limit module capable of filtering and used for pipeline safety monitoring terminal

The invention discloses an amplitude limit module capable of filtering and used for a pipeline safety monitoring terminal. The amplitude limit module comprises a signal filtering module and a signal conditioning module, the signal filtering module is connected with a voltage input line, a voltage regulation circuit which comprises first and second diodes is connected to a line between the signal filtering module and the signal conditioning module, and both the cathode of the first diode and the anode of the second diode are connected to the line between the signal filtering module and the signal conditioning module. The signal conditioning module comprises a first resistor, an NPN triode, a third capacitor and a variable capacitor, the connecting end of the signal filtering module and the signal conditioning module is connected to a line between the first resistor and the base electrode of the NPN triode, the third capacitor is connected with the variable capacitor in parallel to form a parallel line, one end of the parallel line is connected with the collector electrode of the NPN triode, and the other end of the parallel line is connected to a voltage output line. Via the above structure, components in the pipeline safety monitoring terminal can be prevented from damage caused by too high voltage during work, and the pipeline safety monitoring terminal can be popularized and applied.