Abstract: With the frequent natural disasters and the impact of climate change, the dike rescue is facing more and more severe challenges and dangers. It analyzes the common danger of dike such as seepage, piping, loose soil, loophole and the causes of all kinds of danger. According to the idea of blocking before and after the rescue work, it puts forward the treatment measures of these common dike dangers, and discusses the matters for attention in the rescue work. Based on the dike danger in a polder area, a set of comprehensive rescue plan is formulated, and high－density electrical method is used to investigate the whole section of the dike and demonstrate the effectiveness of the rescue plan.