The accessibility of structural inspection is very important for the regular inspection and maintenance of airlines, while the research on structural accessibility analysis of civil aircraft is relatively less. From the requirements of airworthiness clauses, structural accessibility can be divided into visual inspection (general visual inspection and detailed visual inspection) tasks, NDT( non-destructive testing ) tasks and replacement and adjustment tasks, and inspection type tasks are the focus of accessibility analysis. This paper proposes an analysis method for structure accessibility, and the inspection requirements for visual inspection tasks and nondestructive testing tasks are summarized. According to the inspection requirements of inspection tasks, the accessibility inspection level was proposed based on the four perspectives of human body accessibility, structure body accessibility, lighting condition and the use of maintenance resource. The accessibility inspection level was combined with the inspection threshold and inspection repetition interval of inspection task, and the accessibility analysis conclusion was given. Through the case study of the detailed inspection task and NDT tasks of an aircraft, it can be seen that this structural accessibility analysis method is easy to operate, and can give a clear accessibility conclusion, which can provide an analysis approach for the compliance of accessibility airworthiness clauses.