The allowable value test is an important part of the strength test of civil aircraft interiors. In this article, a certain type of interior connection of civil aircraft is explored, general disposal methods and ideas are sorted out, and the principle of selecting the allowable value test configuration of civil aircraft interior insert and test support and loading schemes is put forward. Taking the allowable value of the sidewall panel insert in the cabin of a certain civilian aircraft as an example, it is demonstrated in the article that the proposed method has certain engineering application significance.