The technology of multi-beam digital hologram is proposed to the problem that due to the influence of the illumination,CCD only can receive a little weak scattered wave from the lateral surface of the object,so that it can not reconstruct the multi-surface of the object clearly and brightly at the same time.The proposed method points out that it can use multi-beam to illuminate several surfaces of three-dimensional object.It enhances the intensity of the scattered wave received by CCD from the lateral surface of the object.Multi-surface of three-dimensional object is reconstructed successfully in this experiment.Then,in order to reduce speckle noise of the reconstruction image,is bilinear interpolation and median filter is adopted to process the image,and high quality reconstruction image of three-dimensional object is acquired.