Shenhu area contain a large amount of natural gas hydrate resources， which can effectively solve the problem of future energy shortage. However， due to the complex geological characteristics of the reservoir and the poor physical properties of the reservoir. The difficulty of mining， and the high development cost， a lot of basic research work is still required before commercial mining. This study uses numerical simulation to study the hydrates in the Shenhu area of the South China Sea， establishes a numerical simulation model based on actual geological parameters， uses a single vertical well mining method to study the impact of different production parameters on mining， and evaluates the geological subsidence. The results show that the well The lower the bottom pressure， the higher the degree of reservoir opening and the faster the gas production rate， but the more obvious the formation subsidence. In order to avoid geological disasters， the production pressure should be controlled reasonably.