Abstract: Storm surge is a severe natural phenomena. In order to effectively improve the accuracy of storm surge model, a numerical forecast model of storm surge is constructed based on the study of Shanghai coastal area. The model can simulate the changes of the tide level process under multiple factors such as storm surge and astronomical tide. In order to verify the model, super-strong typhoon "Tail" No. 201718 is selected as a typical case, and the storm surge caused by the typhoon process is tracked and forecasted. It has been verified that the center of the typhoon is located 400 km away from the coast of Shanghai and does not cause storm surge exceeding 1.00 m; the forecast accuracy is good and it can meet the requirements of the storm surge forecast.