Based on modal test data and model updating method, the parameters of material of printed circuit board are identified. The dynamic characteristics of printed circuit board is important to electronic equipment, even though the printed circuit boards have same layers, the Modulus and Poisson's ratio are different due to difference in circuit distribution. In order to get the precise finite element model of printed circuit board, it is necessary to identify the main parameters of material.,Taking one type of printed circuit board used in aerospace as an example, two methods are used to identify the Modulus and Poisson's ratio, one is sensitivity analysis method and the other is response surface method. The results of two methods are close to each other and the MAC of simulation and test is close to 1. The strain output of updated modal in static analysis is close to the result of stress-strain test, which means the identified parameters are good. Parameter identification method based on modal test and model updating method is effectively, and it can be used in identifying parameters of printed circuit board in engineering.