Water softener

A water softener requiring no brine pump for brine transportation adopts the structure that a brine box is arranged above a multi-way pipe, and is communicated with a resin tank through a salt box pipe; a salt box pipe valve is mounted on the salt box pipe; a water inlet pipe valve is mounted on a water inlet pipe; a soft water outlet pipe valve is mounted on a soft water outlet pipe; a water drainage pipe is arranged on the soft water outlet pipe; and a water drainage pipe valve is mounted on the water drainage pipe. During the regeneration of cation-exchange resin, the water inlet pipe valve and the soft water outlet pipe valve are closed first, then the salt box pipe valve and the water drainage pipe valve are opened, and under the action of gravity, brine flows into the resin tank in a salt box after passing through a salt box filter, the salt box pipe, the salt box pipe valve and a water inlet pipe filter; and the brine flows out from the water drainage pipe filter along with waste liquid after exchangin