The main content of this paper is to identify the aerodynamic parameters of Scanlan’s nonlinear empirical model using the data of vortex vertical response. Based on Hthe generalizedH harmonic Hwave functionH KBM method and using the HpresuppositionH of slowly varying parameters, the function of Scanlan’s nonlinear empirical model has been solved. And then the aerodynamic parameters of the model and the Scanlan’s nonlinear vortex-induced force are identified. After the Scanlan’s nParameters Identification of onlinear vortex-induced force is determined, the identification precision is evaluated via the following two methods: the response calculated according to the Newmarkmethod is compared with the field measured response; and compared with the self-excited VIV force which is extracted from the total force collected by the one-dimensional balances. The Experiment is carried in TJ-1 wind tunnel of Tongji University using the preliminarily designed section model of Xiangshangang Bridge. The vertical response of the section model was collected by the laser displacement sensor, and meanwhile the total force was collected by beam-type strain force balances of Hone-dimensionH.