To accurately match the freezing drizzle conditions under the freezing conditions of supercooled large droplet（SLD）， a quantization evaluation method for matching frozen drizzle distribution is developed by analyzing the freezing drizzle condition given in 14CFR25 Appendix O of Federal Aeronautics Administration. The evaluation method introduces the concept of standardized quality scores， and the matching deviation factor between the measured value and the size distribution of frozen drizzle droplets is calculated. The optimal matching cumulative distribution function is constructed by using Rosin-Rammler distribution function， which is used as the minimum matching deviation threshold to quantitatively evaluate the droplet size matching degree. Then， based on the new spray testing platform and two self-developed air-assisted atomizing nozzles Model 1 and Model 2， this method is used to study the matching and evaluation of freezing drizzle conditions. The results show that under the conditions of freezing drizzle （Median volumetric diameter（MVD）<40 μm）， the minimum threshold of matching deviation of droplet size distribution F_c=11.82%， the matching deviation factors F of Model 1+Model 1 and Model 1+Model 2 are 24.08% and 22.02%， respectively， and the matching degree is evaluated as “Fair”. Under the conditions of freezing drizzle （MVD>40 μm）， the minimum threshold of matching deviation of droplet size distribution F_c=3.76%， and the matching deviation factors F of Model 1+Model 1 and Model 1+Model 2 are 22.78% and 14.89%， respectively. Among them， the matching degree of Model 1+Model 1 is evaluated as “Fair”， while Model 1+Model 2 is evaluated as “Good”.