Abstract: The wire icing is the most serious meteorological disaster in the power system’s operation, and the freezing rain is the major disastrous weather causing the wire icing accidents. By using the AWFA freezing rain forecasting system coupled with the mesoscale model WRF, the present research conducted forecast on the three freezing rain episodes in Southern China. The forecasting ability of the AWFA system was examined by testing the TS scores of the simulation results. Based on the freezing rain parameters given by the AWFA system, the wire icing thickness was simulated by using the Ice Acceleration Forecast System, and the results are as follows: 1) A freezing rain episode must meet the criteria below at the same time: existence of a thermal inversion layer, high LWC, and ground temperature below 0°C. 2) The AFWA system is able to forecast freezing rain weather in China, but may overestimate the freezing rain area. The TS scores of the three freezing rain episodes are among 0.30 and 0.63, with an average of 0.45. 3) The simulated wire icing area matched well with the observed intensive freezing rain area, suggesting that the model has good forecasting ability to forecast the freezing rain progress, and is adequate to give out a fine spatial variation of the wire icing thickness. The present research has referenced value to the freezing rain prediction and wire icing forecast in Southern China, and provides valid theoretical foundation for the disaster prevention and reduction of the electric power system.