Abstract: Using the concept of “quality research and development”,this paper analyzes the factors affecting the safety and stability of flame probes on offshore oil platforms. After identifying four end factors,the main causes and non main causes of the flame probe system failure are determined one by one through investigation and analysis,on-site measurement,and other methods. The main reasons for the low safety and stability or high failure rate of the flame probe system are confirmed to be：the failure to install and debug the probe according to the on-site conditions and the failure to maintain it according to standard procedures. After formulating and implementing the solution plan,the number of false alarms from the on-site flame probe was even lower than the set target,effectively preventing the occurrence of safety hazards and ensuring safe production on site.

Key words: flame probe system, safety and stability, confirmation of reasons