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The invention relates to a wave energy pump. The wave energy pump is characterized by comprising a plurality of wave energy collecting floating bodies, a plurality of connecting components used for connecting every two adjacent floating bodies, an anchoring device which is connected at the front end of a first floating body, a plurality of sea water pre-processing devices arranged in the floating bodies, and a high-pressure sea water post-processing device. A single-lug ring and a double-lug ring which are opposite to each two floating bodies are arranged on each connecting component and are connected through a pin shaft, and accordingly the adjacent floating bodies can freely swing in an up-and-down and left-to-right mode. A hydraulic cylinder and a piston rod are connected in each floating body through a ball hinged support, and wave energy is directly and efficiently converted into hydraulic energy by the full utilization of relative movement between every two adjacent floating bodies. The wave energy pump is convenient to assemble and disassemble, when sea circulations with bad wave conditions such as typhoon happen or when the wave energy pump needs to be examined and repaired, floating bodies and the first floating body can be disconnected on the water surface, and the wave energy collecting floating bodies are dragged and transported to a safe sea area to avoid risks or to be examined and repaired. The wave energy pump supplies efficient hydraulic power for sea water desalination, power generation and the like, and can be widely applied to the process of developing sea energy.