A coupling method is developed to describe field-structure interaction.Eulerian multi-material hydrodynamic code is used to simulate fluid field.Lagrangian hydrodynamic finite element code is used to calculate response of structures.Coupling technology is made to merge these two codes.Technology to speed calculation and to avoid mismatch of fluid structure meshs and structure meshs are given.Dynamic response and shock wave propagation within an explosion containment vessel are simulated.Fluid-structure coupling algorithm is used for analyzing coupling of explosion field and structures.It indicates that the method has the ability of simulating fluidstructures interation.