1. It adopts floating bed controlling principle; Two tanks recycle and produce water alternatively; The diameter of the swap tank is short and the loading capacity of resin is small; 2. The all components of the uint use high-strength materials in the molding process; The ceramic non-wear sealing method is adopted inside the valve; 3. Flow transmitters of both salty water and softened water are adopted; The periodical amount of water production and that of brine water consumption is set according to the hardness of raw water; 4. The equipment can coordinate with the liquid level switch and turn itself on and off automatically; It needs no operation from the users; 5. Controller’s humanizing operating interface in Chinese(English) displays different kinds of parameters; It can also turn off the electricity and water, and conduct communication; 6. It is easy to be installed; All the accessories are complete; The parameters can be set at the manufacturing plant according to the hardness of raw water; It can be put into operation immediately once it is installed.