The invention belongs to the technical field of seawave power generation and relates to a floating full-hydraulic seawave generating set. The full-hydraulic seawave generating set comprises an upper floating body 6, a positioning buoy 9, a truss 13, a generator 15, a hydraulic motor 22, an overflow valve 23, a power generating oil cylinder 25 and a main buoy 26. The floating full-hydraulic seawave generating set is characterized by also comprising a differential disc 11, an adjusting buoy 16, an air compressor 19, a one-way valve bridge 24, a waterproof vent pipe 28 and an annular oil tank 29. The floating full-hydraulic seawave generating set can be used for effectively converting seawave energy into electric energy, is suitable for wide sea areas, is capable of freely adjusting own parameters according to the conditions of the specific sea areas and working efficiently and has the advantages of reasonable design, simpleness in manufacturing, low maintenance cost and benefits for popularization and application.