Abstract: The changing of winter temperature and its impact on ice regime were the bases of ice forecast and flood protection in ice seasons. Some researches on temporal and spatial changing of temperature and its relations to ice regime were carried by using statistics methods and the last observation data in the Ningxia-Inner Mongolia Section of the Yellow River (NMYR). The results show that winter temperature has been experiencing obviously warming since the middle of 1980s, at the speed of 0.6℃/10 a since the middle of 1980s. Relationship between temperature and river ice was very close. Higher temperature in November postponed the date of ice running and freeze-up; lower temperature in ice season caused thicker and longer ice cover; and rapid temperature during river breaking-up was favorable to release of channel water storage. The feature of temperature decreasing form upstream to downstream along the river was an important reason leading to ice flood disasters. Since 1980s,winter warming leading to later freeze-up date,thinner ice cover and shorter ice duration. These changes coupled with several channel silting and human activities, increases the potential risk of ice disaster.