A corrugated composite skin has large deformation capability in transverse direction and huge bending stiffness in longitudinal direction. So it can satisfy the deformation and load requirements of the morphing wing skin.A theoretical model between the global deformation of the skin and the local strains at the wave peak and wave trough positions of the corrugation was established when the neutral layer deviated and deformed due to the tensile load.A kind of strain gauge bridge and its signal conditioning circuit were designed for measuring the deformation of the corrugated composites,and the strain measurements were corrected. The relation between the global deformation of the skin and the local strains measured by strain gauge were obtained.A corrugated composite skin was manufactured and was tested in tensile direction by testing machine. The deformation of the whole corrugated composite skin was obtained by the strain gauge according to the corrugated relationship established herein. The results from the measuring system and the deformation of the corrugated composites measured by the testing machine were compared. The comparison shows that the theoretical model and the measuring style are able to provide the global deformation of the corrugated composite skin effectively.