The invention provides a composite type device utilizing the ocean wave energy for generating electricity, comprising a first energy acquisition device, a second energy acquisition device and an electricity generation device, wherein the first energy acquisition device comprises a floating body, a vane wheel, a bracket, a speedup transmission device, a supporting platform; and the second energy acquisition device comprises an air cylinder, an air intake one way valve, an air exhaust one way valve, an air storage tank, a steam turbine, a fixed platform, etc. The invention is characterized in that: firstly, the ocean heading face is provided with the floating body on which the vane wheel is fixed. The movement of waves propels the blades to rotate and drive an intermediate shaft of the vane wheel to rotate together, and drives the generator to generate the electricity by the speedup transmission device; secondly, when the floating body floats upwards, the air is injected into the air cylinder by driving a connecting rod and a piston; and when the floating body falls, the air in the air cylinder is compressed into the air storage tank. When the air pressure in the air storage tank generates a certain value, the pressure valve is automatically opened to push the steam turbine to rotate, and then the generator can be driven to generate the electrical energy. The electricity generation device applies two energy acquiring method, which can double efficient utilize the ocean for generating electricity with good economic benefit.