The agricultural water spray control electrostatic spraying device according to the present invention has a hollow inside and an operation knob is formed as a stop, and a rear part of the operation knob is equipped with a battery for supplying electricity, and a rear end of the main body. A joint is formed extending to protrude toward the front end and connected to the hose to the rear side to receive a flow pipe in which the drug flows inside, and accommodate the front of the flow pipe, wherein the front end is divided into both sides and the nozzle body is divided into both sides of the nozzle body. A nozzle holder hinged to the tip and formed with an outer circumference and a screw is formed, and a rear body is accommodated in the nozzle holder to filter the drug, and a plurality of outlets are supported at the tip of the filter body to allow the chemical to pass through. Nozzle member consisting of an orifice configured to form a core formed and grounded to the core to inject the medicine to the outside The nozzle cap is accommodated in the orifice, the nozzle cap is coupled to the nozzle holder to support the nozzle member, and the end of the nozzle member and the nozzle holder is accommodated and the end portion of the nozzle member is opened, and the electrode plate is caught inside the end. A discharge cap configured to include a locking portion, a screw is formed outwardly of the distal end, and is coupled to the screw to press the locking portion and a fastening plate having an open center, and a positive charge to the flow pipe, and a voltage to charge a negative charge to the locking portion of the discharge cap. An electrode plate which is formed between the generator and the engaging plate and the fastening plate to charge the negative charge charged from the voltage generator with the medicine discharged by the nozzle member, and the medicine flowing from the flow pipe in connection with the flow pipe by stopping the flow pipe are accommodated and dis
