Abstract: The present paper has described the mechanism of the generation of ultrasonic gas jet and the principles of ultrasonic gas atomization(USGA) discussed the influences of gas pressure on the ultrasonic frequency and velocity of atomizing gas during USGA briefly outlined the technical key points to the design and manufacture Hartmann shock tube and USGA nozzle compared the structure,characteristics and application range between several typical ultrasonic gas atomizers and given prospects for the applications of this techniques.