The invention discloses a magnetofluid wave energy underwater charge platform with a compact structure, low noise and high reliability. The charge platform mainly consists of a support, a heaving floater, a connecting rod, a vertical pipe, limited blocks, a main piston, hydraulic devices, reciprocating type liquid metal magnetohydrodynamic generators, an underwater floater, unmanned underwater vehicle docking base stations, an energy storing device, a communication device, a mooring device and a control system, wherein the components are vertically suspended in seawater. The reciprocating type liquid metal magnetohydrodynamic generators which are matched with wave kinetic characteristic and are high in power density are adopted by the invention instead of the existing high-speed rotating generator, so that wave energy is directly converted into electric energy, continuous power supply is provided for the unmanned underwater vehicle docking base stations, and energy source supply is carried out on an unmanned underwater vehicle. Besides charging the unmanned underwater vehicle, the charge platform can supplies power for a plurality of loads, such as a maritime safety monitoring platform, a maritime communication relay station and an ocean observation and measurement platform.