Abstract: Submerged floating tunnel (SFT) is a new type of sea-crossing transportation channel. This paper uses the CFD method to study the dynamic response characteristics of the coupling system of submerged floating tunnel tubes and anchor cables under wave action, and analyze the impacts of different factors, such as submersion depth,buoyance-weight ratio (BWR), inclined mooring angle (IMA), anchor cable stiffness, arrangement pattern of anchor cable system and pre-tension distribution of anchor cable system and wave parameters, on the hydrodynamic characteristics of SFT. The results show that the motion response of the SFT decreases with the increase of submersion depth and increases with the increase of wave height and IMA; there is a reasonable range of values for BWR and the vertical stiffness of the anchor cable to meet the requirements for structural stability; the pre-tension distribution of the anchor cable system is not a critical factor affecting the hydrodynamic properties of SFT; it should avoid the arrangement pattern where only inclined anchor cables are located in the plane and the resonance phenomenon where the SFT- anchor cable coupling system is under specific wave periods.