The invention discloses a leakage monitoring system suitable for heat-conducting oil heat exchangers. The system comprises a steam boiler system, multiple columns of heat exchangers, a boiler feed pump, a vibration and noise sensor and a multi-channel signal analysis system; each heat exchanger comprises a heat conduction oil inlet valve, a heat conduction oil outlet valve, a steam inlet valve, and a condensation water draining valve. Compared with a traditional heat conduction oil heating manner, the steam heating heat conduction oil heat supply manner has the advantages of being safe, and efficient. The system is more and more applied to the industrial heating field. According to the leakage monitoring system suitable for the heat-conducting oil heat exchangers, online monitoring of running of the heat-conducting oil heat exchangers can be conveniently achieved, through signal collection and analysis, whether all rows of heat exchangers are in the normal work state or not is judged,and the failure system is subjected to rapid alarm and isolation.