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Based on the meteorological observation data, ERAInterim and NCEP/NCAR reanalysis data，two lowtemperature freezing rain/snow weather events affecting Liuzhou from 21 to 26 January 2016 and from 28 December 2018 to 2 January 2019 are compared. The results show that： during the two processes, the middle high latitude was in the pattern of two troughs and one ridge, and the blocking high pressure was 28 dagpm stronger than that in the same period of the normal year； the continuation of cold advection transportation and the supplement of cold air flow at upper levels was an important reason for the lower temperature in 2018 than in 2016; continuous moisture convergence in the middlelower layer, longterm inversion layer maintenance and strong inversion intensity made the duration and range of snowfall stronger in 2018 than in 2016; the strong northwest airflow in the middle layer made the cold air move southward rapidly during the process of 2016. The jet stream at 700 hPa and the wind speed convergence zone were more southern than normal at 850 hPa, resulting in the snowfall mainly in the southern Guangxi, while there was only a small amount of snow in Liuzhou, and the temperature was rising quickly.