The water treatment filling machine assembly line integrates water treatment and filling functions. In terms of water treatment, suspended particles are removed through sand filters, activated carbon filters, precision filters, etc., ion exchange resins are used to soften water, and ultraviolet rays, ozone or chlorine disinfection is used to sterilize and disinfect; in terms of filling function, it can accurately measure and fill, adapt to various packaging forms such as plastic bottles, glass bottles, cans, etc., and has high-speed filling capabilities.