Nantong Binjiang Park hydrophilic platform which is located in Nantong Langshang Scenic Area belongs to Taoyuan dangerous section of Yangtze river. In August 12, 2012, partial collapse of hydrophilic platform happened suddenly and thus made a severe geological disaster. This paper studies the causes of the disaster from the hydrological and geological reasons. Then specific suggestions and treatment measures is given to repair the geological disaster.