Abstract:Based on the analysis of the necessity of the special demonstration of the impact of flood control on the underground public works in specific project, The flood control safety impact during the construction period and the service period is studied respectively. The finite element software is used to analyze the impact of the construction period on the surrounding flood control facilities. Some reasonable suggestions are put forward for the hidden dangers of flood control safety during both of the construction period and service period of the underground public works. Finally, the conclusion of flood control demonstration is drawn.