Abstract: Through experimental research to understand the atomization performance of the spiral nozzle, the performance parameters such as spray cone angle, nozzle flow rate, spray range, particle velocity, and average diameter of droplets (SMD) were studied by laser particle size analyzer and high speed camera. The results show that under the same injection pressure, the jet distance of the liquid, the atomization angle of the nozzle outlet and the axial velocity of the fog particle decrease with the increase of the nozzle inclination angle. However, the nozzle flow and fog particle SMD increase with the increase of the spiral inclination of the nozzle. When the system injection pressure is 2 MPa, the spiral tilt angle has the least influence on the nozzle flow rate, and the reduction is only 0.004 L/s; and at 25 cm from the nozzle, the 30° spiral nozzle at the system pressure is 3 MPa, fog particle SMD is the smallest, with a minimum of 30.04 m; when the system injection pressure is 3 MPa, the spiral tilt angle has the greatest influence on the axial velocity of the fog particle, and the change range of its velocity is 10.3 m/s.