In order to obtain precision plastics part，the accurate prediction of mold deformation is necessary for large-scale injection mold.But now no available software is powerful enough to finish the prediction work independently.One acceptable way is using more than one software to do a coupling analysis，such as do an injection molding simulation with a special software to get basic data and then based on these data to do a structural analysis with ANSYS.But the key problem is how these data could be input into ANSYS and whether these data are acceptable by ANSYS.An integrated analysis method for part molding and its mold structural mechanics was presented using different softwares，based on identical meshes formed originally from CAD model.By use of the identical meshes，the data of molding and structural analysis were point-to-point matched and could be shared completely between them.With one self-developed polymer injection molding CAE software and ANSYS，an integrated analysis of one real space product was done.In this study，the mold deformation caused simultaneously or independently by maximum injection pressure and temperature was analyzed，and by which mold stiffness was checked and improved while the deformation of mold structure and parts was controlled in an acceptable range.