Four full-scale energy-saving composite sandwich wall panels under transverse load were studied experimentally.Experimental results,such as failure processes and modes,the ultimate load-bearing capacity,load-deflection curves and concrete load-strain curves of these sandwich panels were analyzed comparatively.Test results show that the failure modes,the flexural stiffness,the ultimate strength of the sandwich panels are affected by the size of the panel,the ration of steel bar and the size of hole.The failu...