The regular evaluation of the effectiveness of the Continuous Airworthiness System is the mandatory requirement of airworthiness regulations, and it is also an important means for the main manufacturers of civil aircraft to continuously improve the system and improve the operation quality of the system. At present, the effectiveness evaluation of the system only adopts qualitative evaluation, and the objectivity and scientificity of the evaluation results are difficult to guarantee. Through the analysis of the connotation and performance characteristics of the effectiveness of the Continuous Airworthiness System, the operational effectiveness of the system was divided into hierarchical indexes, and the weight of each index was determined by using the analytic hierarchy process, which was then verified to provide a more objective and scientific evaluation method for the effectiveness evaluation of the Continuous Airworthiness System of the aircraft main manufacturers.