Very large floating structure （VLFS） is a large multifunctional floating structure integrating airport and seaport. Most of the existing studies focus on the dynamic response of rigid module flexible connection model under regular waves， but ignore the dynamic response caused by the flexibility of maritime airport under typhoon driving waves. Given this， a new modeling method of flexible module rigid connection of VLFS is proposed. The measured wave spectrum of typhoon Migi is finely simulated by using Jonswap spectrum characteristic parameters. The overall and local nonlinear vibration characteristics of VLFS in maritime airport under typhoon driving waves are analyzed， and the energy conversion mechanism between maritime airport and environmental load is revealed. The results indicate that flexible module rigid connection model of maritime airport can better reflect the dynamic response characteristics of such VLFS structures. The maritime airport is significantly nonlinear due to structure flexibility and the inhomogeneity of the typhoon and waves field. The displacement， angle and hydroelastic deformation are mainly along the flow direction， spanwise direction and vertical direction respectively， and the extreme stress is mainly distributed near the strut of VLFS. The environmental load energy and structural gravity potential energy are mainly converted into mooring potential energy in the initial stage， and structural kinetic energy and elastic potential energy in the stable stage.