The high energetic particle generated from nuclear fusion will severely change material structures and properties of the reactor, where the surface of the steering gear would become fluffy. On this basis, the SRIM software is introduced in this paper, aiming to investigate the impact of different ions with different masses and energies on material structures in order to observe the damage on the material caused by the radiation. According to our simulation, a drop in 13% elastic property has been observed. The bombardment can produce a considerable amount of damage, which should be taken into consideration during the design. Thus, the tungsten shield can’t be used as weight supporting element. Besides, regarding the above discussion, a wider margin should be taken into consider when designing the fusion reactor. We hope to figure out some uncontrollable error and imperfection still existing in the simulation. These results offer a guideline for better observation of the damage on the material caused by the radiation.