As short wavelength light source such as soft X-ray laser is employed in holography,it's possible to generate 3D holograms with high spatial resolution.But currently there are still lots of problems,computer simulation of soft X ray laser holography provides a powerful method.In this paper,block,English letter and Chinese charchter were used as the samples to simulate non lens Fourier transform soft X ray laser holography.The simulation results are in accord with the theories as well as the results of visible light holography.