A wing is an important structure of aircraft and the aeroelastic analysis is an essential work in aircraft design. In order to meet the design target of aeroelasticity, the accurately predcition of its structure dynamic properties is required. During the aeroelastic design process, we often have to modify the parameters of the wing, so that the quick and accurate calculation of the wing structure dynamic properties after modifications is very important to improve the efficiency of the whole aircraft design. Because of the complex of the wing structure, the computational cost of repeat analysis of the dynamic properties is very high. In order to overcome this problem, structural dynamic reanlysis is use to solve the problem. This method is to reuse of the information before the modification to predict the responses of the wing after parameters variation.The method is validated by a practical wing system AGARD 445.6. The results indicate that the method can effectively improve the efficiency of structural dynamic analysis in aeroelastic design.