Abstract: As the requirement that actual project needs analyzing ship structural strength,we found that it is so necessary to do fast assessment for naval vessel structural properties.So based on numerical simulations by multiple kinds of computer aided softwares,we probed into the method of fast assessment and established a preliminary framework with the combination of a variety of CAE software.Ship collision damage analysis in this paper, for example,demonstrated the feasibility of this fast assessment system,which could sync quickly analyze all kinds of collision damage and corresponding damaged structural residual strength.All reflect the advantages o f numerical simulation method,which based on fast assessment of structure,in the field of damaged ship＇s residual strength evaluation.