The snow crystal sprayer is the key component of the snow maker. Its atomization effect directly determines the snow forming ability of the snow maker. The physical model and inner internal flow field of the snow crystal sprayer were established based on the snow crystal sprayer, the core component of the snow maker. The internal flow field of the snow crystal sprayer was calculated by means of numerical simulation. In view of the change of the mixing chamber length and the outlet diameter of the snow crystal sprayer, the VOF model was used to study the gas-liquid two-phase distribution in the snow crystal sprayer. The DPM model was used to study the influence of the above parameters on the atomization particle size of the snow crystal sprayer. The rule of atomization particle size and occurrence frequency was analyzed, and the influence of key geometric parameters on the snow crystal sprayer was explored. This provides a scientific basis for the structural optimization of the snow crystal sprayer. The simulation results show that the length of the mixing chamber has a great influence on the atomization effect, and the outlet diameter has a certain influence on the atomization effect. The structure of the snow crystal sprayer to achieve better atomization effect is that the length of the mixing chamber is 30 mm and the diameter of the outlet is 1.1 mm.