In the field of reticulated shells, the research of joints is always a hot spot.But such research mainly focuses on?the intensity of various types of joints, the stiffness of joints is rarely involved.This paper is to analyze how the stiffness of?an often used joint in reticulated shells changes with the basic parameters of it in the elastic extent with the general FEA?program ANSYS.Then the approximately linear expressions on the stiffness to these parameters are given.Some discussions?on the reason why stiffness changes in some rules are presented.In the end, some valuable conclusions are achieved.