Abstract: A new rice translator general chassis mounted low volume air assisted rice boom sprayer was designed to meet the demand of chemical pest control in rice field. This sprayer characterized light weight, high efficiency, saving pesticide and being friendly to environment. The techniques of low volume spraying and air-assisted boom spraying were applied at the same time in this system. The small droplets toward to the target by assisting of air stream can increase the penetrability. Experimental results show that the new sprayer can save more than 15% pesticides, working speed in rice field is 0.82～0.98　m/s, and working efficiency is 2 hm²/h, wind speed of air assistant outlet is more than 14 m/s, improving the utilization rate (above 35%) and control efficiency and decreasing significantly environmental pollution caused by the application. At the same time the key technological problems between low volume and boom air-assisted spraying for this rice sprayer have been solved.