Abstract: The most household water softeners selling on the market have no the function of antibacterial and sterilization. Be for long years out of repair of the municipal water supply pipeline and the complexity of the water situation, soft water machine is easy to breed bacteria. Therefore, adding the antibacterial function in the soft water machine is very necessary. By comparing the different methods of sterilization, this paper selected the optimal scheme and used it in the mature machines, which will provide a basis for the update and iteration of the antibacterial products in the future.

Key words: Antibacterial sterilization, Residual chlorine generator, Health