A float-type offshore power generating platform comprises a float, an anchoring
system, a power generating
system, a
power transmission and
distribution system, and an energy-storage
system, and is fixed in a sea area near a small island in an anchoring manner, a plurality of box bodies are integrally connected to form a platform through bolts, the float is used for providing
buoyancy force for the platform, and the box bodies comprise a plurality of
wind power generating box bodies, a plurality of
solar power generating box bodies, a plurality of
ocean current power generating box bodies and an
energy storage box. During the work of the platform,
electric power produced by the power generating system is partly conveyed to the load on an island through a
submarine cable, redundant
electric power is used for preparing
hydrogen through electrolyzed water and the
hydrogen is stored in a
hydrogen fuel battery, and in case of
natural energy source insufficiency, the fuel battery can be used as an auxiliary
energy source for supplying power to the load. According to the float-type offshore power generating platform,
clean energy is adopted for power generation, the land space of the island is not occupied, the power generating system is modularized, and the mounting and the dismounting are convenient.