The utility model belongs to ocean engineering or exploitation of marine energy field, especially a marine semi -submerged body electricity generation formula wave absorption wall, including wind power generation set, pilot lamp, flotation tank, flotation tank obturator, wave -power generation device, mooring system, drainage assembly, cable and battery. The contained angle that its characterized in that, flotation tank met between sea slope and the horizontal plane is between 30~35, and its principle is that the wave climbs at the domatic water that gushes, turns into the potential energy with the wave energy, turns into the electric energy with the potential energy through wave -power generation device, realizes the energy conversion when playing good wave absorption effect, and wind power generation set also produces the electric energy in addition, finally stores in the battery through the cable, and simultaneously, the signal lamp has indicates and early warning function. The wave absorption flotation tank is whole to be floated in the surface of water to use mooring system to be fixed in the seabed. The utility model discloses easily installation and removing had not only alleviateed the wave calamity but also the make full use of wave energy, had wide market prospect.