Abstract: Using NCEP reanalysis data and automatic station observation data, a comparative analysis of two cold wave events in Neijiang from January 19th to 22nd, 2024 (Process 1) and February 20th to 23rd, 2024 (Process 1) was conducted. The results indicate that both processes developed under a circulation pattern characterized by two troughs and one ridge. The dfferent intensity and path of the cold air and the associated cold advection at 850 hPa led to a gradual temperature drop peaking after 48 hours in Process 1, while the most significant temperature decrease in Process 2 occurred within 24 hours. Process 1 was accompanied by a weak southern branch trough, where southwesterly flow converged with northerly winds over the southern Sichuan Basin, resulting in increased precipitation in Neijiang and across the entire Basin. In contrast, the absence of a southern branch trough in Process 2 caused moisture to converge predominantly in the southeastern part of the Basin, leading to less precipitation.