The invention discloses a coral type wave energy collecting device and belongs to the field of wave energy. The coral type wave energy collecting device is mainly composed of a swing body and a carrier. The swing body is of a flexible cavity structure. The swing body is made of a flexible tensile material and is fixed to the carrier. The carrier is also of a hollow structure and is internally provided with a high-pressure pipeline, and the carrier communicates with an inner cavity of the swing body through a one-way valve. In the initial state, the swing body and the pipeline are filled with fluid media. During work, the swing body swings and bends with the fixed end as the fulcrum, the volume is forced to be compressed so that the media in the swing body can be forced to enter the high-pressure pipeline, and wave energy is absorbed and stored. Then, the acting media flow back into the swing body to form circulation. In addition, a metal magnetic fluid body or piezoelectric element ina flexible swing body forcing body can also be used for power generation. The invention further provides an application embodiment that the coral type wave energy collecting device is combined with offshore wind power, photoelectric and automatic net box. Due to the fact that the flexible swing body is adopted, a complex hydraulic system is omitted, and swing type energy absorption becomes flexible, simple, high in efficiency and high in viability.