The invention discloses a holographic display system based on multiple digital micromirror devices, comprising an image processing and control unit, at least two digital micromirror devices, a light emitting system, a beam expanding and splitting system, and a stereoscopic imaging device. A holographic image of a three-dimensional object is subjected to further transformation to generate multiple mutually-different secondary images, target diffraction orders can be coherently cascaded in conjunction with the use of the digital micromirror devices, targets may be superposed in display space by adjusting the secondary images, the positions of the digital micrometer devices and the like, other disturbances are not superposed, the brightness of the targets is evidently higher than that of non-target orders, the contrast of a reconstructed image is increased greatly, it is guaranteed that relative strength of the targets is many times as high as that of the single digital micrometer device, and the reconstruction effect of a three-dimensional system is improved.