The ultrasonic spray nozzle has the outstanding advantages of compact structure, high spraying efficiency, low flow rate (controllable), uniform spraying layer, small atomized particles, environmental protection and heating. Compared with the traditional spraying method, it can control the spraying speed and flow rate, so there will be no waste such as sputtering during the spraying process, which can save 80% of the solution, effectively reduce production costs, reduce environmental pollution, and decrease the harm to the human body to the minimum.