Abstract:On the basis of collecting and analyzing the newly gained information, major ecological environment problems occurred in the downstream of the Yellow river are introduced in this paper, such as water pollution, water resource deficiency, ground subsidence, ground crack, ground collapse, sand liquefaction, soil salinization and instability of the dyke. Countermeasures for protecting ecological environment problems are put forward as well. It will have a high reference value in national resource exploitation, flood control, disaster protection and prevention, and eco[CD*2]geological environment protection.