Abstract: Under common demands of warship structure for fireproof,blastfroof and high velocity fragment resistance,the MCFS structure,a symmtrical multi-lays composite structure,which is made up of steel plate,heat insulation cushion and FRP,has been putted forward.The comparative experimental research for deformation and energy absorption property of MCFS and MFS(steel/FRP/steel sandwich) structures has been carried out.The experiment results show that the frontal steel plate has similar deformation model for the two structures.However,the deformation model of mid-lay FRP is different,the large deformation and heave of back face in MCFS and the ceramics cotton has little limit for the deformation of mid-lay FRP,but there is no visible deformtion cone in MFS.The ballistic experimental results show that the ability of fragments resistance and impact energy absorbing of MCFS is superior to MFS with the same weight per area.At the same time,the ballistic impact experiments for single steel target and single FRP laminates also have been done,the energy absorbing mechanism of MCFS is analysied on the base of experiments above.