Abstract: Based on the conventional surface and upper data,intensive automatic weather station observations data,NCEP/NCAR 1°×1° and 2.5°×2.5°reanalysis data of every 6 h in terms of the synoptic principle and the dynamic diagnosis,the strong cold wave process in Jinsha River Wudongde Hydropower Station dam area has been analyzed during 23—25 January,2016.The results are as follows:the major influential systems of this process were transverse trough at middle and high latitudes,southern trough,cold front shear and strong surface cold high pressure.The strong frontal zone of surface cold front was the main reason for the persistent gale.The strong cold advection at the lower troposphere resulted in the sudden drop in temperature.The three conditions,involving the structure of lower-level convergence and upper-level divergence and strong ascending stream,the sustained water vapor of the Bay of Bengal along the strong southwest airflow and the vertical temperature distribution of the area below -2℃ above 850 hPa,comprised the main factors of dynamics,moisture and condensation for snow in Wudongde Hydropower Station dam area.