Fully automatic water filters are widely used in fields such as metallurgy, chemical industry, petroleum, papermaking, medicine, food industry, mining, electric power, and city water supply. They can be used in the treatment of industrial waste water and circulating water, regeneration of emulsified liquid, filtration treatment of waste oil, continuous water injection and blast furnace water systems in metallurgy, dephosphorization by high pressured water in hot rolling. They are fully automatic filtration devices that are high-tech, highly efficient, and easy to operate.