In order to solve the problem that reliability of fuel system components is difficult to estimate,the working time data of fuel pump components,hydraulic mechanical components,fuel flow sensors and fuel nozzles were collected.Weibull probability charts were drawn respectively for the working time of different components.Three-parameter correlation coefficient optimization method was used to estimate the parameters of Weibull distribution model.The reliability functions,failure efficiency functions and failure probability density functions of different components were obtained according to the parameter estimates.Finally,reliability evaluation and analysis of fuel system components were carried out.The results show that:as a complex mechatronic system,Weibull distribution model can be used to effectively evaluate the aero-engine fuel system components service life,and can be used to analyze the reliability of aero-engine fuel system components.