NOVELTY - The material has a pin structure foam composite sandwich buoyancy body material platform (6) whose right and left sides are respectively mounted with solar energy batteries (5, 7). A flood gate (12) of a motor (13) is connected to a solar energy cell (15). An energy storage battery (17) is connected to a controller (18), and a photosensitive automatic control switch (20) is connected to an inverter (19) through an electric conduction line (11). A substation (21) is connected with the control switch and a tidal energy power plant (22) through a floating power transmission cable (23).    USE - Composite sea buoyancy material for photovoltaic power generation and tide generation of complementary power station.    DETAILED DESCRIPTION - The energy storage battery is lithium ion battery or a nickel cadmium battery or nickel hydrogen battery or sodium-sulfur battery or zinc empty cell or redox liquid flow battery or lead-acid battery or lithium iodine battery or silver iodide battery or fuel battery. The tidal energy power plant is a single tidal energy power plant or bi-directional tide power station. The other solar energy battery is single crystal silicon solar energy battery or polysilicon solar energy battery or amorphous silicon thin film solar energy battery or amorphous silicon/microcrystalline silicon double stack solar energy battery or CuInGaSe film solar energy battery or cadmium telluride thin film solar energy battery or gallium arsenide thin film solar energy cell or dye-sensitized solar energy battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a composite sea buoyancy material.    Solar energy batteries (5, 7)    Pin structure foam composite sandwich buoyancy body material platform (6)    Electric conduction line (11)    Flood gate (12)    Motor (13)    Solar energy cell (15)    Energy storage battery (17)    Controller (18)    Inverter (19)    Photosensitive automatic control switch (20)    Substation (21)    Tidal energy power plant (22)    Floating power transmission cable (23)