The invention discloses a water lubrication plunger pump. The water lubrication plunger pump comprises a shell, a left end cover, a right end cover, a cam shaft, a distributing valve block, plunger piston shoe assemblies, compression springs and distributing valves. The left end cover and the right end cover are installed on the shell. The left end and the right end of the cam shaft are installed on the left end cover and the right end cover. The distributing valve block is fixedly installed on the shell and is provided with a flow inlet channel, a flow outlet channel and plunger cavities. The plunger piston shoe assemblies are arranged in the plunger cavities, stretch in the shell and comprise plungers and piston shoes. The compression springs are vertically arranged in the distributing valve block. The distributing valves are arranged in the positions, corresponding to the plunger piston shoe assemblies, of the distributing valve block. According to the water lubrication plunger pump, water can be used as a medium to conduct dynamic and static pressure mixing supporting, and dynamic and static pressure mixing supporting has the beneficial effects of being high in rotation precision, wide in speed and load range, low in friction resistance and power consumption and the like. The problem that a water lubrication sliding bearing is likely to be abraded under the high-speed and heavy-load condition is solved, the reliability of the plunger pump is improved, and meanwhile the water lubrication plunger pump has the beneficial effects of being free of pollution, small in maintenance and the like.