Abstract: Based on a quasi-static experiment of outer-shell connection (OSC), the finite element model is put forward. Compared with test data, the validity of the model is testified. Then multiple factor analysis of OSC, including the thickness of outer shell, flange plate and web plate of T-shaped members, with or without ribbed stiffeners, is carried out. And the effects of these factors on the mechanical performance of OSC are analyzed and summarized. Through multiple factor analysis, some conclusions are drawn that can provide some references for engineering practices.