The lag problem of reliability assessment of the aero-engine was studied aiming at the limitation existed in the traditional assessment methods.The dynamic aero-engine reliability assessment model was established by using fuzzy integral method.Reasonably fault samples of every stage for data fusion were used

which were key issues of dynamic assessment for aero-engine reliability.The failure intensity factor was introduced.The failure rectification process was expressed by the low half normal distribution function of failure intensity factor.Fuzzy density was obtained by the failure intensity factor.The reliability targets of aero-engine were fused using Choquet fuzzy integral method.Dynamic assessment for reliability targets of aero-engine was realized.The research results were applied to the small turbofan engine.Using Choquet fuzzy integral data fusion method for dynamic assessment can take the importance of each stage fault samples in consideration.The method provides scientific evaluation for the aero-engine reliability.