The airworthiness certification is an internationally accepted legal administrative act to ensure civil aviation safety， an important component of the core competitiveness of the national civil aviation industry， and an important force in promoting the healthy development of the civil aviation industry and the strategic transformation of the national economy. In this paper， the “three principles” model of airworthiness certification is proposed， aiming at compliance of technical standards for airworthiness certification， differences in airworthiness management standards， and acceptability of airworthiness certification results among countries. Through an in-depth analysis of the concept， model， and practice of the “three principles” of airworthiness certification， the theoretical connotation of the “three principles” relationship of airworthiness certification is revealed， and the relationship model between the “three principles” of airworthiness certification is established. The study of this model can guide the international cooperation on airworthiness and the construction of airworthiness regulatory system. In addition， the effectiveness of the “three principles” model has been verified in airworthiness certification practice. Through the research on “three principles” of airworthiness certification， we can continuously improve the compliance of technical standards， narrow the differences in management standards， and ensure that the certification results are widely accepted by the international community. This will enhance the international discourse and influence of China’s civil aviation airworthiness certification， and create a fairer international policy environment to facilitate the development， expansion and internationalization of China’s civil aviation industry.