Preparation device of ferron used for water treatment and application method thereof

The invention relates to a preparation device of ferron used for water treatment. The device comprises a power source (1), an iron source generator (9) and an electrolyte liquid storage pot (2), wherein the iron source generator (9) is composed of one or more grades of tubular generating units (10); each tubular generating unit (10) comprises an insulation tube body (6) as well as an anode layer and a cathode layer which are interactively nested; an annular passage is arranged between the anode layer and the cathode layer and is used for the liquid to flow through; and the electrolyte liquid storage pot (2) is communicated with one end of the tubular generating unit though a pipeline, and the other end of the generating unit is provided with a liquid outlet (8). Under the action of current, the device can rapidly and efficiently generate an iron liquid with high concentration; and the method provided by the invention can process water under the action of precipitate and flocculation. The ferron prepared by the method in the invention can rapidly purify water body, and has strong instantaneity, economy, environmental protection property and industrial applicability.