Abstract: Some liquefaction failure examples and their forming mechanisms extracted from survey results at the Yellow River delta since 1980s were briefly summarized and reviewed. It suggests that soil liquefaction is one of the main cause of geohazards in the estuarine area.Achievements of field testing and theoretical studies are also presented in this paper.There are problems remained unsolved. Based upon the findings,suggestions and recommendations are proposed for further consideration,such as, understanding more about the basic regional soil property distribution, testing soil liquefaction process, and establishment of forecasting systems etc.