Abstract: In order to study the stability of a long-span membrane structure in varied environment, tensile tests of the membrane materials were carried out. A 1:1 geometric model of the membrane structure architecture was established using SOLIDWORKS software. Based on the finite element theory, a static analysis model for the membrane structure was proposed to obtain its equivalent stress nephogram. To simplify the analysis steps, parametric modeling of ANSYS software was employed to establish the static analysis model at cross connector of the membrane structure, with which variation rules of the membrane structure were analyzed under different temperatures, gas rib diameters, and internal pressures. The results show that for membrane structures with a diameter of 335 mm, the maximum stress in membrane surface increased from 48.14 to 58.84 MPa as the internal pressure increased from 0.018 to 0.022 MPa, which would greatly increase the load of membrane materials. If taking no account of the security coefficient, the appropriate temperature of membrane materials would decrease from 70 to below 56℃, indicating that membrane structures made of the membrane material cannot sustain high temperature working conditions.