Abstract: A sea wave impacted power generating device, comprising essentially a fix support, a movable bearer, a blade type water wheel, two pressure cylinders, a storage cylinder, two braking means and several floating bodies. Bottom of said movable bearer has several floating bodies mounted thereon and floated on then face. Square horn port and water channel thereof are used to introduce impact impulsion force of sea wave to push a blade type water wheel and further to rotate an eccentrically mounted connecting rod. Connecting rod is used to cause displacement of piston of the pressure cylinder to generate high pressure air to be stored in a pressure cylinder and used for power or electricity generating device activated by high pressure air.