The invention provides a sea wave power generation technology which is used for solving the key technical problem of energy absorption conversion and electric power treatment of random sea wave. A device is composed of an energy absorption system, a power generation unit and an electric power processing system. The energy absorption system is composed of V-shaped floating bodies and a connecting rod; and the V-shaped floating bodies at two ends of the connecting rod float up and down and swing front and back to obtain random reciprocated power input. The power generation unit is composed of an input shaft, a speed increasing system, a direction regulating gear box, a fly wheel box and a generator; the power generation unit is used for increasing the speed of random reciprocated rotation obtained by the input shaft, regulating the direction by the direction regulating gear box, and outputting high-speed unidirectional rotation to a fly wheel; and the fly wheel obtains kinetic energy to drive a silicon rectifying alternating current generator to generate power so as to obtain direct current with stable voltage and basically-stable current. The electric power processing system comprises a voltage adjusting device, an inverter and the like; and the direct current output by the generator is processed to obtain alternating current with stable voltage and frequency to supply a load to use or is connected into a power grid.