针对民机改装适航验证流程复杂、效率低下的问题，提出了基于“内容-条款-任务-指标”的结构化CSTI模型，通过分层解析改装需求、匹配适航条款、生成验证任务及确定验证指标，实现适航验证流程的规范化。将模型与数字化适航验证系统和数据库相结合，可实现自动化生成验证任务、对比验证指标并管理验证数据。以飞机氧气系统改装为例，运用CSTI模型系统地分析了验证的流程及指标，指导验证任务实施，并对验证指标进行评估，验证结果表明了适航验证系统的可行性和模型的适用性。最后探讨了该模型及系统与新兴技术结合的可能性，并提出相关设想。研究成果可为飞机改装数字化适航验证提供高效、可扩展的解决方案，为后续适航验证系统的智能化发展提供理论参考。

In view of the complex procedures and low efficiency of the airworthiness verification for civil aircraft modifications, a structured CSTI model was proposed. The model was designed to standardize the airworthiness verification process by hierarchically analyzing modification requirements, matching airworthiness clauses, generating verification tasks, and determining verification indicators. The model was integrated with a digital airworthiness verification system and a database to enable the automated generation of verification tasks, the comparison of verification indicators, and the management of verification data. Taking the aircraft oxygen system modification as an example, the verification process and indicators were systematically analyzed, the verification tasks were guided, and the verification indicators were evaluated. The results indicate the feasibility of the airworthiness verification system and the applicability of the model. The potential for combining the model and system with emerging technology is discussed and relevant proposals are provided. The research outcomes provide an efficient and extensible solution for digital airworthiness verification of aircraft modifications and serve as a theoretical reference for the intelligent development of future airworthiness verification systems.