A water spraying apparatus having water saving function, comprising: a pressurized motor and a nozzle. Wherein, a part of said pressuring motor is embedded into a water pipe. Said pressuring motor is provided with a motor bobbin, to receive power to rotate a rotation disc, rotates synchronously with said pressurized motor and a plurality of pistons, brought into motion by said rotation disc. Through reciprocal movement of said plurality of pistons, water and air is pressured into said water pipe, so that water and air in said water pipe is transported to said nozzle.
