Abstract: The investigation on the temperature shift owing to the leakage of fuel pipelines is the fundamental research in the leakage's monitoring technology based on optical fiber sensors. This paper presents a theoretical analysis of the temperature shift caused by fuel pipeline leakage. The simulation in combination of real data and physical model shows that the monitoring technology based on optical fiber sensors is universally applicable to fuel pipelines that lie in different surroundings, and the easier the fuel pipeline leakage occurs (owing to a larger pressure), the easier this leakage is monitored.