Bolted flange joint is widely used in most kinds of industrial structures. In order to indicate the static or dynamic response accurately, an exact and efficient finite element model needs to be built. For the parameters are not certain when building the model, the numerical simulation and experiment were synthetically employed to study the determination of the model′s mesh parameters and contact parameters. After confirming the parameters, the finite element model of bolted flange not only has high computational accuracy, but also has ideal computational efficiency.