In this paper, the biaxial tensile tests of nine types of domestic G-type membranes were carried out, and the correlation between the biaxial tensile elastic modulus and the uniaxial ultimate tensile strength and various technical parameters was studied. The results show that the warp elastic modulus of all nine membranes was greater than the weft, and the Poisson's ratio exceeded 0.5. Tensile strength, weave count, fabric areal density, membrane areal density and thickness were positively correlated with the elastic modulus, and the fiber diameter was negatively correlated. Linear regression analysis revealed that the elastic modulus is not determined by a single factor but is the result of the interaction of multiple factors, providing a scientific basis for the multi-scale analysis and parametric design of the membranes.