Aiming at the problem that the large ship lock is easy to generate temperature cracks due to improper temperature control and destroy the overall structure,we apply the method of temperature stress simulation to research the problem.Taking comprehensive factors such as the influence of concrete performance,boundary conditions into account,combined with the APDL language of ANSYS for secondary development,we write the thermodynamic parameter command flow to analyze the transient temperature field and stress fields of the lower gate of the Honghua second ship lock.The results show that the temperature can be effectively controlled by reducing the pouring temperature and the water passing measures.The process framework for calculating and controlling the large volume coagulation temperature stress is summarized,which can be used in actual engineering.