The service experience of civil aircraft engine and auxiliary power unit shows that the uncontained engine rotors failure still occurs due to various complex factors. In order to analyze the harm caused by uncontained rotor failures of engine and auxiliary power unit, combined with the AC20-128A and the engineering experience of aircraft design, different types of rotor failure models were designed and studied. This paper first introduces the definition of different types of debris, then defines and classifies rotor failure models according to different design requirements and adaptation scenarios. Finally, it describes the construction methods of rotor failure models, expounds the design points and application in engineering, which has certain guiding significance for design and engineering application of engine and auxiliary power unit uncontained engine rotors failure models for civil aircraft.