An experimental and numerical study of laminated tubes with [45°/70°/-45°/0°2]s under different combinations of tension-torsion biaxial loading is presented. The effect of biaxiality ratio on biaxial strength is discussed. Moreover, a progressive damage model to simulate the failure behaviour of laminated tubes under different combinations of tension-torsion biaxial loading is presented. The main advantage of the model is that it can simulate the failure behavior of laminated tubes under combined tension-torsion biaxial loading by using the experimental results of unidirectional flat specimens. The maximum error between predicted strength and experimental results is within 9%. The experimental and numerical results show that the axial load carrying capacity of tubular specimen decreases rapidly as biaxiality ratio increases.