The invention belongs to the technical field of dynamic analysis of connection structures, and particularly relates to a bolt connection model interface parameter identification method. The method comprises the following steps: S1, through a quasi-static experiment on a tangential interface of a bolt connection structure, obtaining experimental data used for constructing an objective function and calculating an initial value of a tangential parameter; S2, constructing an objective function according to the experimental data in the step S1 and theoretical data in a pre-constructed theoretical model, and calculating an initial value of a tangential parameter; s3, optimizing the constructed objective function according to the initial value of the tangential parameter, and obtaining an identification result of the tangential parameter; s4, through a quasi-static experiment on a normal interface of the bolt connection structure, obtaining experimental data for linear fitting; and S5, carrying out linear fitting according to the experimental data in the step S4, and obtaining a normal parameter identification result. By means of the method, dynamic analysis of the bolt connection assembly body is well achieved.