Abstract: Based on the data of Dengkou, Baotou and Tuoketuo meteorological stations, this paper mainly analyzes the characteristics of the emperature change and the ice regime situation of the key period in Ningxia-Inner Mongolia section of the Yellow River when ice floating, freezing and opening. It is concluded that the first ice floating of the Ningxia-Inner Mongolia section of the Yellow River in 2018-2019 is the latest since the record; The time from floating to freezing was short and the maximum length of freeze-up was short; The ability to flow under the ice is better, the duration of the small flow in the Toudaoguai station is shorter, and the channel-storage increment is smaller, The temperature in the late stage of the river is high and the date is earlier. This research can provide useful reference for ice condition forecast and ice prevention decision-making.