Title: EPS buffer FEM stress analysis and structure optimization based on (the real test) Abstract: in this paper, three different density of EPS material, in accordance with the provisions of packaging test standards for testing and verification on the mechanical properties of the material, to obtain the corresponding stress-strain curve and cushion coefficient stress curve by analyzing the data; the different mechanical properties analysis, obtained when the same EPS material density, the thickness of the material impact more it can bear the larger, but its buffer efficiency is low; when the EPS material with the same thickness, material density is greater impact force which can bear larger, but its buffer efficiency is low. System composed of EPS buffer material at the same time for the MB70-3006G washing machine beauty of the drop tests were conducted, obtaining acceleration time curve of the system. And the acquisition and Simulation of the acceleration time curves were compared, set parameters in the simulation model, to ensure that the two data. Finally obtains a set of FEM modeling method, provides a general modeling simulation package system for the follow-up of the material.