This text use 3-d linear interpolation to transfer the pressure data of the impeller which get from FLUENT,The node data which we got can be provided as the ANSYS analysis to use.With the help of ANSYS,we can make strength analysis of loading pressure distribution impeller.The result enunciation the applied of 3-d linear interpolation in pump by turn the Fluid-Solid Interaction analyze match the emulation,being promise the premise of the calculation accuracy descended to reduce calculation quantity,making Fluid-Solid Interaction analyze match imitate to the fact and providing a more accurate method for impeller 's Fluid-Solid Interaction analyze.