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