Abstract: In order to ensure the rationality of the anti-seismic design of liquid storage tanks,analysis and comparison of Housner model and Haroun-Housner model based on the two equivalent hydrodynamic effects theories are made,and the modal analysis and the seismic response spectrum analysis are carried out,and the fluid-solid coupling model of two different sizes of liquid storage tanks were established using ANSYS.The calculation results are compared with the Housner and Haroun-Housner theoretical results.The analysis results show that the formula solution of first-order sloshing frequency of two models and of first fluid-solid coupling frequency of Haroun-Housner model have high accuracy.It is reasonable to design rigid liquid storage tanks with Housner model,but it is not conservative for flexible liquid storage tanks,because the calculation results of Housner model and fluid-solid coupled model are very close for rigid tank but the difference between the calculation results of Housner model and fluid-solid coupled model is large and the simulaiton results of Haroun-Housner model are well agreed with the calculation results of fluid solid coupling model for the flexible tank.It is reasonable to design flexible liquid storage tanks with the Haroun-Housner model based on the assumption of elastic deformation of container.