Abstract: Marine renewable energy has broad application prospects. Compared with the single energy utilization device, the floating multi-energy combined power generation device can better realize the optimal allocation of resources and reduce the development cost of energy. In order to fully understand the development prospects of multi-energy combined power generation devices, this paper starts with the multi-energy combined power generation integration scheme, analyzes the differences between different types of combined power generation devices, and summarizes their technical characteristics. Next, the research progress of each module analysis method and multi-module coupling dynamics analysis method of the floating multi-energy combined power generation device is clarified and summarized in such aspects as theoretical research and simulation. Finally, the applicable scenarios of the various methods are analyzed and the development trends, problems, and challenges of floating multi-energy combined power generation devices are discussed, aiming to provide references for the subsequent construction of economically feasible floating multi-energy combined power generation devices.