Abstract: Based on the data of Shangrao TWP8 wind profiler radar,Jiangxi WebGIS radar mosaic and ground automatic station,this paper analyzes the four types of weather under the influence of topography in the eastern corridor of Jiangxi Province.The results show that the threshold value of valley effect △W in the eastern corridor of Jiangxi Province is ≥3.5 m·s-1.Heavy rainfall has a great influence on the wind profiler radar signal.Although the signal reaches saturation to form a large value area or appears “hole”without data,resulting in data distortion,this phenomenon often indicates the emergence of heavy rainfall or strong weather.The influence of the eastern corridor of Jiangxi Province on the cold air shows that the high-altitude wind is relatively large,and slowly penetrates down over time;The wind direction of cold air near the surface has a transition process,from westerly to easterly;Due to the narrow valley effect in the eastern corridor,the wind speed of cold air along the eastern corridor is increasing,and it lasts for several hours.When it moves to the wind field exit of the eastern corridor,the narrow valley effect makes the echo in the middle part of the squall line develop violently,resulting in thunderstorm,gale,hail and other severe weather.When the southwest airflow in the south is gradually strengthened,and the momentum of the upper southwest jet is transmitted downward,the wind direction in the eastern corridor of Jiangxi Province turns to southwest wind,the rainstorm will occur in this area.The wind profile radar of Jiangxi Blizzard weather has the following characteristics:（1）the west gale area is above an altitude of 3 km;（2）The easterly weak wind area is below the altitude of 0.9-1.2 km;（3）0.9-3.2 km is the wind shear zone;There is warm advection over Shangrao wind profiler radar;The wind shear layer between 0.9-3.2 km along the wind profile is closely related to the inversion layer between 850-700 hPa.