The utility model relates to an electrostatic spraying device and a remote-control multi-rotor wing plant protection spraying machine. A plurality of liquid spray pipes are arranged on a liquid guide bracket; an atomizing spraying head is mounted on each liquid spray pipe, and is arranged in an electrostatic rack; a lap of metal wire is arranged on the inner side at the lower end of the electrostatic rack, and is connected with an electrostatic generator through a wire; the electrostatic spraying device is mounted on the spraying machine; an insecticide cylinder is communicated with the liquid guide bracket of the electrostatic spraying device through a pump and a conduit. The remote-control multi-rotor wing plant protection spray machine is high in operation efficiency, and can conduct spraying operation in the area where people is difficult to operate; due to the magnetic field attractive force function, the adhesive force of sprayed insecticide is reinforced; insecticide sediment and adhering rate is further improved; insecticide usage amount is reduced; ideal prevention and cure effect can be achieved; prevention and cure cost is reduced; pollution and damage to environment are reduced.