Aimed at the problem of excessive structural motion response caused by less constraints of weakly connected double floating body system in marine engineering, a multi-constrained offshore floating wind turbine coupled with hydrogen energy storage double floating structure is proposed based on the concept of "one machine, one storage" structure. The dynamic response characteristics of the multi-constrained double floating structure under general sea conditions are simulated and analyzed by Ansys software. The results show that: the wind-storage double floating structure coupled with hydrogen energy storage device is of small motion response in the three main degrees of freedom of surge, pitch and heave; the maximal heave motion amplitude of the hydrogen energy storage unit is only 7.21% of the height of the energy storage unit. The wind turbine coupled hydrogen energy storage double floating structure with multiple constraints under general sea conditions is of excellent motion performance.