The invention discloses a test system for dynamic response of bridge full-bridge elastic model to wind, wave and current coupling. The test system comprises: a wind, wave and current coupling field simulating system used for generating a target wind, wave and current coupling field through a simulation-feedback-control mechanism; a bridge full-bridge elastic model which is arranged in the wind, wave and current coupling field simulating system and is used for simulating the appearance, the rigidity, the quality and the damping characteristics of an elastic structure of the full bridge in construction and completion states of the bridge; and a test analyzing system used for acquiring and analyzing wind, wave and current coupling field parameters, and dynamic responses, such as displacement, acceleration speed, underwater foundation surface dynamic water pressure distribution, and foundation six component forces, of the bridge full-bridge elastic model under the action of the wind, wave and current coupling field. According to the invention, the test system can realize simulation of the wind, wave and current coupling field with space correlation and time continuity and synchronization, simulation of the full-bridge elastic model in construction and completion states of the bridge, and real-time test and analysis of the wind, wave and current coupling field parameters and dynamic responses of the bridge full-bridge elastic model. Beyond that, the test system is convenient to implement, achieves high precision and strong reliability.