Pesticide application is the main method to control pests and diseases. The mechanical power generated by the sprayer make the pesticide in the form of droplets, and the kinetic droplet move under the action of gravity and air resistance, and finally deposited on the target. In this way, the droplets drift in the air and the deposition rate of pesticides on leaves is low. This not only reduces the utilization rate of pesticides, but also seriously pollutes the environment. Electrostatic spray technology is to connect high voltage static electricity to liquid. There forms an electrostatic field between nozzle and crop target. This course introduce the technology of electrostatic spray, how to charge droplets, and the application currently.